1 dimensional motion
2 dimensional motion
Forces
Circular Motion
Grab Bag
100
What are the ways an object could experience acceleration?
Speeding up, Slowing down, Changing direction
100
If a ball is tossed at an angle of 45 degrees into the air at 10m/s, what will the velocity be when the ball gets back to the ground.
10m/s
100
What is Newton's First Law of Motion?
An object in motion will stay in motion at a constant velocity, and an object at rest will stay at rest unless acted on by an unbalanced force.
100
What are 3 forces that can provide the necessary components for an object to have circular motion?
Gravity, Tension, Friction
100
Give 4 examples of vector quantities.
Force, Displacement, Velocity, Acceleration
200
A 10kg object is dropped from a 15m high tower. How long will it take that object to hit the ground?
1.75s
200
If I increase the speed at which a car is rolled off a cliff, what is going to happen to the time it will take for that object to fall to the ground?
Stay the same
200
How does the normal force change when an object is motionless sitting on a ramp of 32 degrees?
The normal force remains perpendicular to the surface so it is 32 degrees shifted from being straight up. The magnitude of this force decreases because friction is also now balancing out some of the force of gravity and the ground cannot "push back" with enough force to equal the force of gravity.
200
What is tangential velocity?
Speed an object would have if the centripetal force was broken and the object began to travel along the tangent of its location in the circle.
200
True or False. Weight and mass are proportional but not equal.
True
300
On a displacement graph, what would constant increasing velocity moving away from the origin look like?
Parabolic shape starting at the origin and moving in the positive upwards direction
300
A gun is fired off horizontally from the top of a 100m hill with a speed of 350m/s. What is the range of the bullet?
1581m/s
300
A 30kg snow blower is pushed across the snow using 50 N of force along the handle of the blower, which makes a 35 degree angle with the horizontal. What is the acceleration of the mower considering there is no friction between the blower and the snow?
1.4m/s2
300
Describe the centrifugal force. What direction does this factitious force seemingly have?
The apparent force that draws a rotating body away from the center of rotation. It is caused by the inertia of the body in motion.
300
How many years old are you if you have lived a billion seconds?
31.7 years
400
A jet ski has an initial velocity of 5m/s. If it acclerates at 2m/s2 for 7 seconds, what is the average velocity of the jet ski?
12m/s
400
A football was thrown into the air with an initial velocity of 10m/s at a 28 degree angle. How far will that football travel from where it was thrown?
8.8m
400
What force is necessary to keep a 1000kg car moving up a ramp with an angle of 36 degrees at a constant velocity if the coefficient of friction is .2?
7346N
400
A child is sitting 2m from the center of a rotating merry go round. What period must this child have in order to experience a centripetal acceleration of 50m/s2?
1.3s
400
What is the total (resultant) displacement of a jogger who runs 1 mile south, 8 miles west, 7 and miles north?
10 miles NW
500
An object starts at rest and accelerates uniformly at 3m/s for 10 seconds. Then it travels at a constant velocity for 12 seconds. Finally it accelerates uniformly again at 5m/s for 2 seconds. What is the distance the object travels in this 24 second time period?
580m
500
What height would a tennis ball reach if it was wacked by a racket at 25m/s at a 50 degree angle from the horizontal?
143m
500
What kind of friction is there between a car tire and the road while the driver is applying the brakes?
Static Friction
500
A 25kg ball is attached to a string that is 1m long and moves in a horizontal circle completing 4 revolutions is 1.75s. What is the frequency of that ball?
2.3rev/s
500
An elevator is ascending to the penthouse of an apartment building and then slows to a stop at 5m/s2. What is the normal force of a 70kg passenger in the elevator?
1036N
M
e
n
u