Momentum - exam practice
Momentum
Question 1 of 10
1 of 10
A javelin thrower exerts a force of 100 N on a javelin for a time of 0.30 s.
The javelin has a mass of 0.80 kg.
What is the rate of change of the momentum of the javelin?
Question 2 of 10
2 of 10
A trolley of mass 1.0 kg is moving on a horizontal surface at a constant velocity of 2.0 m s−1. A force of 3.0 N is applied to the trolley in the opposite direction to its motion for a time of 1.5 s and then the force is removed.
What is the magnitude of the final momentum of the trolley?
Question 3 of 10
3 of 10
The momentum of an object moving to the left is 28 kg m s−1.
A force of magnitude 3.5 N acts on the object to the right for a time of 2.0 s.
What is the change in the momentum of the object?
Question 4 of 10
4 of 10
A puck of mass 0.16 kg is sliding on ice with a constant velocity of 11.0 m s−1. A hockey stick exerts a force on the puck, for a short period of time, in the opposite direction to the velocity of the puck.
The momentum of the puck changes by 2.0 kg m s−1.
Ignore friction.
What is the speed of the puck when it leaves the hockey stick?
Question 5 of 10
5 of 10
A ball, initially at rest, is struck by a hockey stick. It leaves the hockey stick at speed v.
Which quantity, together with the mass of the ball, can be used to determine v?
Question 6 of 10
6 of 10
A body of constant mass falls freely due to gravity.
The rate of change of momentum of the body is equal to its
Question 7 of 10
7 of 10
Two ball bearings X and Y are projected from horizontal ground at the same time.
X has mass 2m and is projected vertically upwards with speed u.
Y has mass m and is projected at 30° to the horizontal with speed 2u.
Air resistance is negligible.
Which statement is correct?
Question 8 of 10
8 of 10
In a test a 500 kg car travelling at 10 m s–1 hits a wall. The front 0.30 m of the car crumples as the car is brought to rest.
What is the average force on the car during the impact?
Question 9 of 10
9 of 10
A car of mass 580 kg collides with the rear of a stationary van of mass 1200 kg.
Following the collision, the van moves with a velocity of 6.20 m s−1 and the car recoils in the opposite direction with a velocity of 1.60 m s−1.
What is the initial speed of the car?
Question 10 of 10
10 of 10
What is true for an inelastic collision between two isolated objects?