AP Physics 1 : AP Physics 1
Study concepts, example questions & explanations for AP Physics 1
All AP Physics 1 Resources
Example Questions
Example Question #50 : Impulse And Momentum
A bullet of mass 
When the bullet is at its maximum height, it has no vertical velocity component. Also, since we are neglecting air resistance, the horizontal velocity remains constant. Therefore, the velocity of the bullet at its maximum height is simply the initial horizontal velocity:
Plugging in values, we get:
Then using the expression for momentum:
Example Question #51 : Impulse And Momentum
An arrow of mass 
Since the arrow is shot directly upward, we can easily calculate the velocity of the arrow after 8 seconds:
Plugging in our values, we get:
Which is also:
Then using the expression for momentum, we get:
Example Question #52 : Impulse And Momentum
Deep in space Object 
How should the final momentum relate to the initial momentum?
They will be the same
The final momentum will be less because the objects stuck together
The final momentum will be greater because the objects stuck together
There is not enough information to determine the final momentum
They will be the same
Momentum is always conserved in a closed system. Thus, since this system has no external forces acting on it (such as gravity, friction, electromagnetism, etc.) then momentum will be the same at the end as in the beginning.
Example Question #53 : Impulse And Momentum
Deep in space, mass 
All three of the masses are identical.
None of these
The initial collision in completely elastic, all of the momentum and energy is transferred to the second mass.
The second collision is completely inelastic, all of the momentum is retained by the two objects that stick together.
Since all three of the masses are identical:
Combining equations
Example Question #54 : Impulse And Momentum
A spaceship of mass 
Determine the velocity of the ship after
Plugging in values
Using
Example Question #511 : Ap Physics 1
Two football players are pushing on each other during a play. The offensive player is pushing the defensive player backwards. What can be said about the forces in this situation?
The players are exerting unequal forces on each other because the offensive player is exerting more force on the ground that the defensive player.
The players are exerting unequal forces on each other, the offensive player is exerting more force on the defensive player.
The players are exerting equal forces on each other, however, the offensive player is exerting more force on the ground that the defensive player.
It is impossible to determine anything without knowing the mass of each player.
None of these
The players are exerting equal forces on each other, however, the offensive player is exerting more force on the ground that the defensive player.
Based on Newtons laws, the players are exerting equal forces on each other. The reason the offensive player is "winning" is that he is able to push harder against the ground than the defensive player.
Example Question #56 : Impulse And Momentum
A spaceship of mass 
Determine the acceleration of the ship.
None of these
Plugging in values
Example Question #57 : Impulse And Momentum
A spaceship of mass 
Determine the momentum of the ship after 
None of these
Plugging in values
Using
Using
Example Question #58 : 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 #512 : Ap Physics 1
Two identical rockets are placed on the back of cars. Car 
How will the momentum of each car compare?
They are the same
None of these
Impossible to determine
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.
Certified Tutor
All AP Physics 1 Resources
