Order of Magnitude
Unit Conversion
1D Kinematics
2D Kinematics
Momentum
Energy
Circular Motion
Forces
100
What is the order of magnitude of 1062x1024?
1027
100
Convert 1000mm to meters
1 meter
100
A student walks 4 meters East, then 3 meters West. Find the student's displacement.
1 meter East
100
True or false: Acceleration is a vector.
True.
100
If a 400-kg car is going at 10m/s, find the momentum.
400kg*m/s
100
Define inertia.
Tendency of an object to resist change during motion.
100
What is the formula for centripetal acceleration?
100
What is the acceleration due to gravity on Earth?
9.81 m/s^2
200
What is the order of magnitude of 14.8x109?
1010
200
A sprinter runs 100 meters in 9.8 seconds.Convert the speed to km/h
36.73 km/h
200
A car travels 100 meters North in 20 seconds, then 100 meters South in another 20 seconds.
a) What is the average speed for the trip?
b) What is the average velocity?
a) 5 m/s
b) 0 m/s
200
All vectors have ____________ and ______________.
Magnitude and direction!
200
Cart A has a mass of 3kg and a speed of 4m/s. Cart B has a mass of 4kg and a speed of 3m/s. Compared to the momentum of Cart A, Cart B has...
the same momentum
200
A ball is thrown straight up into the air. At what point is its PE the greatest?
At the highest point of its motion.
200
If a student whirls a stopper overhead in a horizontal circle with a radius of 1 meter and the stopper completes 10 revolutions in 10 seconds, what is the speed of the whirling stopper?
6.28 m/s
200
Which diagram represents a box in equilibrium?
C
300
What is the order of magnitude of the total number of students at Bronx Science?
103
300
Convert 55 miles per hours to meters per second. (1 mile = 1609m)
24.6 m/s
300
A position-time graph shows a straight line with a positive slope. What does this indicate about the object's motion?
Object is moving at a constant velocity in the forward/positive direction.
300
A baseball player throws a ball to first base. While the ball is in the air, what is the direction of its acceleration?
Downward (towards the center of the Earth)!
300
If the direction of a moving car changes and its speed remains constant, which quantity must remain the same?
A) Kinetic Energy
B) Displacement
C) Momentum
D) Velocity
A) Kinetic Energy
300
When a force moves an object over a distance, what is it called?
Work
300
A car weighting in at 500 kg travels down a circular track with a radius of 10 meters. The car completes 12 revolutions in 60 seconds. How fast is the car moving?
12.57 m/s
300
Four forces act concurrently on a block on a horizontal surface as shown in the diagram below.
As a result of these forces, the block
A) moves at a constant speed to the right
B) accelerates to the right
C) moves at a constant speed to the left
D) accelerates to the left
D) accelerates to the left
400
How many nm are in one Gm?
1018
400
The period of a wave is 4 seconds. What is its frequency in Hz?
250 Hz
400
How far does this object travel during the 10-second interval?
50 meters
400
Nafisur throws a baseball to Justin at an angle of 45 degrees from the horizontal. As the ball rises, its acceleration...
a) remains the same
b) increases only
c) increases, then decreases
d) decreases, then increases
a) remains the same
400
An 8 kg ball is fired horizontally from a 1,000 kg cannon at rest. After having fired, the momentum of the ball is 2,400 kg*m/s east. Calculate the magnitude of the cannon's velocity after the ball is fired.
2.4 m/s
400
As a car abruptly uses its brakes, kinetic energy is converted into...?
thermal energy
400
Scientists are observing a planet named "Hoovef-7" has a distance of 2.89*10^13 meters to its stop. The diameter of "Hoovef-7" is 2.36*10^6 and its mass is 5.96*10^24. The mass of its respective star is the same as the sun's. What is the force of gravity acting on "Hoovef-7"
9.48*10^17 N
400
Blocks A and B are not attached to each other when force F is applied. The instantaneous acceleration of block B is
A) 12 m/s^2
B) 4 m/s^2
C) 6 m/s^2
D) 8 m/s^2
D) 8 m/s^2
500
How many humans tall is Mount Everest (8.82 km)?
104 humans tall
500
Convert 1250cm3 to m3.
1.25*10-3 m3
500
A car starts from rest and accelerates at 3 m/s2 for 5 seconds. What is its total distance traveled during this time?
37.5 meters
500
A student standing on a knoll throws a snowball horizontally 4.5 m above the level ground toward a smokestack 15 meters away. The snowball hits the smokestack 0.65 seconds after being released. At the instant the snowball is released, the horizontal component of its velocity is approximately
23 m/s
500
A 2400 kg car moving at 24 m/s collides with a 4600 kg car that is waiting at rest at a traffic light. After the collision, the cars lock together and slide. Eventually, the combined cars are brought to rest by a force of kinetic friction as the rubber tires slide across the dry, level asphalt road surface. How long does it take for the force of kinetic friction to bring the two cars to rest after the collision?
1.20 seconds
500
A ball with a mass of 0.5kg is moving at 4m/s. What is its KE?
4 J
500
A ball attached to a rope is moved at a constant speed in a horizontal circular path. it is surrounded by a barrier with a small opening. At which point should the ball be released to leave the barrier?
Point E
500
A net force of 10 N accelerates an object at 5 meters per second2. What net force would be required to accelerate the same object at 1.0 meters per second?
A) 3 N
B) 2 N
C) 7 N
D) 8 N
B) 2 N
600
What is the speed of a car traveling at the Dutch daytime Motorway speed limit (100km/h) in terms of the speed of light (c)?
9.259*10-8 c
600
An ice cube has a volume of 2.5 L. Convert this to m3.
2.5*10-3 m3
600
A stone is thrown vertically upward with a speed of 15.5 m/s from the edge of a cliff 75.0 meters high. What is its speed just before hitting the water?
41.4 m/s
600
A stone is thrown horizontally from the top of a building with an initial velocity of 15 meters per second. At the same instant, a second stone is dropped from the top of the same building. The two stones have the same... (select all that apply)
a) initial horizontal velocity
b) initial vertical velocity
c) final velocity
d) path as they fall
None of the above!
600
A 2400 kg car moving at 24 m/s collides with a 4600 kg car that is waiting at rest at a traffic light. After the collision, the cars lock together and slide. Eventually, the combined cars are brought to rest by a force of kinetic friction as the rubber tires slide across the dry, level asphalt road surface. Calculate the speed of the locked together cars immediately after the collision.
8.23 m/s
600
A rollercoaster with a mass of 500 kg rests 20m above the ground. What is its PE?
98100 J
600
a)
600
The diagram below shows a child pulling a 50 kg friend on a sled by applying a 300 Newton force on the sled rope at an angle of 40° with the horizontal.
The vertical component of the 300 Newton force is...
A) 510 N
B) 230 N
C) 190 N
D) 32 N
C. 190 N
700
The approximate number of meter sticks that, laid end-to-end, would go from one end of the U.S. to the other.
106
700
Convert 500 J to kg*m2/s2
500 kg*m2/s2
700
The acceleration due to gravity on the Moon is about one-third what it is on Earth. If an object is thrown vertically upward on the moon, how many times higher will it go than on Earth, assuming the same initial velocity?
3 times higher
700
A projectile is launched at an angle above the ground. The horizontal components of the projectiles velocity vx, is initially 40 m/s. The vertical component of the projectile velocity, vy, is initially 30 m/s. What are the components of the projectiles after 2.0 seconds of flight? Assume g is 10 m/s.
A) vx=40 m/s, vy=10 m/s
B) vx=40 m/s, vy= 30 m/s
C) vx=20 m/s, vy = 10 m/s
D) vx=20 m/s, vy = 30 m/s
A) vx=40 m/s, vy=10 m/s
700
On a snow-covered road, a car with mass 1.3*103 collides head-on with a van with mass 2.7*103 kg traveling at 12 m/s. As a result, the vehicles lock together and immediately come to rest. Calculate the speed of the car immediately before the collision. (Neglect friction)
24.9 m/s
700
How much power is required to lift a 200N weight to a height of 5m in 10 seconds?
1000W
700
. The Moon does not crash into the Earth because:
(a) the net force on it is zero.
(b) it is beyond the main pull of the Earth’s gravity.
(c) it is being pulled by the Sun as well as by the Earth.
(d) it is freely falling but it has a high tangential velocity
(d)
700
A wooden crate is on a wood ramp 30° above the horizontal. The vector labeled mg is 100N. Find the perpendicular force of the crate on the ramp.
86.6 Newtons
800
What power of 10 is the frequency of the photon produced when Jibran is converted into pure energy? Jibran has the same mass as 2 Justins. Justin is 51 kg.
1052 or 52
800
A 100 W device runs for 2 minutes. How much energy does it use in Joules?
12,000 Joules
800
Almes and Oliver are cycling in Van Cortlandt Park. Oliver starts from rest and accelerates at 1.5 m/s2. Almes starts 12 seconds later from the same point but accelerates at 2.1 m/s2. How much time does it take Almes to catch up to Oliver?
77.5 seconds
800
An artillery shell is fired at an angle to the horizontal. Its initial velocity has a vertical component of 150 m/s and horizontal of 260 m/s. What is the magnitude of the vi (initial velocity) of the shell?
300 m/s
800
The instant before a batter hits a 0.26 kg baseball, the velocity of the ball is 45 m/s west. The instant after the batter hits the ball, the ball's velocity is 57 m/s east. The bat and ball are in contact for 3.0*10-3 seconds. Calculate the magnitude of the average force the bat exerts on the ball while in contact.
8.8*103 N
800
An object slides down a frictionless ramp from a height of 4m. What is its speed at the bottom?
8.86 m/s
800
A 0.098 kg metal stopper is attached to the end of a rope. Mendez R spins the stopper in a horizontal circle with a radius of 0.5m. Determine the speed of the stopper, if its moving 10 revolutions in 5 seconds.
6.28319 m/s
800
A 30 Newton force is applied to a Teflon box at an angle 40° above the horizontal. This box is traveling at a constant velocity across a Teflon surface. Determine the frictional force acting on the crate.
22.98 Newtons
900
How much money, in $100 bills, can be stuffed inside a duffel bag? Give your answer as a power of ten.
106 dollars
900
A delivery drone flies in a straight line. It starts from rest and accelerates at 3 m/s2 for t seconds. Then it decelerates at -2 m/s2 until it comes to rest. The total trip takes 20 seconds. What is t (i.e. how long does it spend accelerating for the first part of the trip)?
t = 8 seconds
900
A fire hose held hear the ground shoots water at a speed of 6.5 m/s. At what angle should the nozzle point in order that the water land 2.5 m away?
18 degrees or 72 degrees
900
A 0.40 kg soccer ball is rolling east at 6.0 m/s when it is kicked and sent flying west at 14 m/s. The foot was in contact with the ball for 0.0050 seconds.
Calculate the magnitude of the average force the foot exerted on the ball.
1.6*104 N
900
A 66-kg skier starts from rest at the top of a 1200-m long trail which has a vertical drop of 230 meters. At the bottom, he reaches a speed of 11 m/s. How much energy was dissipated by friction?
1.4x105 J
900
A 2-kg object moves in a horizontal circle of radius 3.0 meters at a constant speed of 6.0 m/s. What is the magnitude of the net centripetal force acting on the object?
24 N
900
A 150 Newton force applied to a wooden crate at an angle of 30° above the horizontal, causes the crate to travel at constant velocity across a horizontal wooden floor. Calculate the magnitude of the horizontal component of the 150 Newton force.
129.9 Newtons
1000
If number 2 pencils were laid tip to tail across the length of the United States, what would be the order of magnitude for the amount of number 2 pencils needed?
108
1000
A person jumps out of a fourth-story window 18.0 m above a firefighter's safety net. The survivor stretches the net 1.0 m before coming to rest. What was the average acceleration experienced by the survivor when she was slowed to rest by the net?
-176.6 m/s2
1000
A projectile is fired with an initial speed of 36.3. ms at an angle of 42.2 degrees above the horizontal on a long flat firing range. How much time does the projectile spend in the air?
5.02 seconds
1000
A 1.5 kg cart is moving east at 3.0 m/s on a frictionless track. It collides with a stationary 2.0 kg cart. Just before the collision, a 0.20 kg piece of clay is launched vertically from the moving cart at 15 m/s upward and does not affect the horizontal motion of the cart.
What is the total horizontal momentum of the system just before the collision?
4.5 kg*m/s
1000
The work exerted on a 20 gram baseball with a momentum of 0.2 kg*m/s after it gets stopped by a glove in 2 seconds (the ball travels 20 centimeters while being slowed down and the force that catcher in enacting on the ball is 120° from its direction of motion).
W = -0.01 J
1000
A 1.5 kg rock is whirling around a flat circle at the end of a 85 cm string. It has a linear speed of 1.8 m/s. Calculate the tension of the string.
5.72 N
1000
A 1000-kg car moving at 10 m/s collides with a 2000-kg car at rest on the side of the road. After the collision, the cars slide together and lock. The cars are brought to a halt by friction in 1.3 seconds. What was the force of friction exerted by the road on the sliding cars?
1538.3 Newtons