AP Physics 1 : Linear Motion and Momentum
Study concepts, example questions & explanations for AP Physics 1
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Example Questions
Example Question #56 : Impulse And Momentum
A spaceship of mass 
Determine the acceleration of the ship.
None of these
Plugging in values
Example Question #51 : Impulse And Momentum
A spaceship of mass 
Determine the momentum of the ship after 
None of these
Plugging in values
Using
Using
Example Question #51 : Impulse And Momentum
Tom drops a ball of mass 
Impulse is just the change in momentum. To find the velocity when the ball hits the ground, we need to use kinematics. We know the height the ball is dropped, the acceleration, and the initial velocity, so we can use the equation 
When the ball bounces back up it reaches a height of 
Assuming up is positive, the magnitude of the impulse is just
Example Question #51 : Impulse And Momentum
Two identical rockets are placed on the back of cars. Car 
How will the momentum of each car compare?
None of these
Impossible to determine
They are the same
The heavier car has more momentum
The lighter car has more momentum
They are the same
Using
Where 
It can be seen that since both cars have the same force applied for equal amount of time, they have identical final momentums.
Example Question #52 : Impulse And Momentum
An object's momentum as a function of time is the following:
What is the force of the object (as a function of time) that causes the motion?
Therefore, we simply need to differentiate our momentum equation with respect to time to determine the force.
Example Question #61 : Impulse And Momentum
An object travels for 
Therefore, to find the change in the momentum, we need to sum the force in the various time intervals. Remember, we are only interested in the first 
Example Question #61 : Impulse And Momentum
A 
None of these
Using conservation of momentum.
The initial momentum is the combined mass of the truck and the rocket moving together
The final momentum is made up of the momentum of the truck and the rocket, which are now moving in opposite directions
Combining equations
Plugging in values:
Solving for
Example Question #63 : Impulse And Momentum
A 
None of these
Using conservation of momentum:
The man and the skateboard are stuck together, and thus become one mass:
Plugging in values:
Solving for
Example Question #481 : Newtonian Mechanics
Two wagons are held together with a rope. Lodged between them, is a very powerful spring. The rope is suddenly cut, allowing the spring to launch the wagons. If the first wagon has a mass of 
None of these
Using conservation of momentum.
Since nothing is moving, the initial momentum is zero
The final momentum is made up of the momentum of the two carts
Combining equations
Plugging in values:
Solving for
The negative sign symbolizes that it will move in the opposite direction of the first cart.
Example Question #65 : Impulse And Momentum
Two wagons are held together with a rope. Lodged between them, is a very powerful spring. The rope is suddenly cut, allowing the spring to launch the wagons. If the first wagon has a mass of 
Using conservation of momentum.
Since nothing is moving, the initial momentum is zero
The final momentum is made up of the momentum of the two carts
Combining equations
Plugging in values:
Solving for
The negative sign symbolizes that it will move in the opposite direction of the first cart.
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