MA1 Review
A skydiver at rest jumps out of an airplane at 4,000 meters. How fast will they be traveling in meters per second after 4 seconds?
-39.24 m/s
What is the difference between a scalar and a vector?
Vectors have both magnitude and direction, whereas scalars only have the magnitude.
What is an example of a field force?
Examples: electrical, gravitational
How many degrees are there in four revolutions?
1,440 degrees
Calculate how much work is done by a child pulling a wagon. The child pulls the handle with a force of 240 N at an angle of 30 degrees. The wagon moves 7 m down the sidewalk.
1454.92 N*m
A rocket is launched from the ground with an initial velocity of 25 miles per hour. When the rocket reaches its highest point, it has a velocity of zero for a split second. What is the height of the rocket in meters when it reaches its highest point?
6.4 m
Christopher ran 16 miles at 50 degrees south of west. How far west did Christopher run?
10.3 miles west
A runner has a mass of 68 kg and an acceleration of 1.5 m/s2. Determine the runner’s net force applied to the ground.
102N
What type of velocity describes the motion of an object around a circle?
tangential velocity
A generator converts 103,200,000 J of chemical energy into 40,932,000 J of electrical energy. How efficient is the generator? Round to the nearest percent.
40%
Write a situation where a person has a negative acceleration but is speeding up.
An object falling to the ground from gravity on the way down.
A flight attendant walks 1.5 miles per hour down the aisle toward the back of a plane. The plane is traveling at a rate of 550 miles per hour. What is the flight attendant's velocity relative to the plane?
-1.5 mph
Which scientist developed a law describing the attractive force between objects in the solar system?
Isaac Newton
A washing machine drum during a spin cycle can spin up to 800 rpm. If it takes the drum 5 seconds to reach the top speed from rest, what is the acceleration of the washing machine drum?
16.76 rad/s2
A spring stretches by 0.17 m when a bag of potatoes weighing 55 N is hung from its end. If the spring constant is 323.5 N/m how much elastic potential energy does the spring have when it is stretched this far?
4.7 J
Kenna takes her dog for a run. They start walking at a speed of 3.5 mph and accelerate to a speed of 6.0 mph over 30 seconds. What is Kenna's acceleration?
0.083 mi./hr./sec.
A drop of water goes over a 250 m waterfall at a speed of 6.7 m/s. How far has the droplet fallen after 4 seconds?
78.48 m
Which scientist described gravitational fields as curves in the fabric of space and time that causes other objects to fall toward the object in the center?
Albert Einstein
A merry-go-round has a moment of inertia of 300 kg⋅m2 and an angular velocity of 15 revolutions/minute. Determine the merry-go-round's angular momentum.
471 kg*m2/s
If Rooney is cross-country skiing, has a mass of 56.7 kg, and her kinetic energy is 367.4 J, what is her speed?
3.6 m/s
Identify the number with the most precision in the problem below.
18.345+12,000+84.20+355.01
18.345
A stunt car drives off a 150m cliff at a speed of 45mph. What is the car's velocity in the y-direction after 2 seconds?
-19.62
The moon does not orbit Earth in a circular path as the distance between these two objects changes. During a super moon, the moon is at its closest point to Earth (356,761,000 m). Determine the effects of Earth's gravitational field on the moon at this point, known as the perigee. Earth's mass is 6 x1024 kg.
3.14x10-3 N/kg
Determine the rotational inertia of a hoop with a mass of 6 kg and a radius of 0.75 m.
3.375 kg*m2
A 25 kg tree limb is 14.4 m above the ground. During a hurricane, it falls on a roof that is 6 m above the ground. Find the kinetic energy of the limb when it reaches the roof. Assume no air resistance
2058 J