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Conservation Of Momentum Practice
Test Description: Practice conservation of momentum problems
Instructions: Answer all questions to get your test result.
1) A 175 kg ball moves with a speed of 25 m/s to the right. The ball collides with a second 185 kg ball moving in the same direction with a speed of 22 m/s. After the collision, the speed of the 185kg ball is 18 m/s to the right. New of 175kg ball?
A
9.34 m/s
B
2.23 m/s
C
29.23 m/s
D
84.45 m/s
2) A car of mass 750 kg travels at 40 m/s to the right. The car collides with a 1200 kg truck which is traveling at 35 m/s to the right. The two interlock as a result of the collision. What is the final velocity of the car-truck system?
A
40.0 m/s
B
35.0 m/s
C
72.0 m/s
D
36.9 m/s
3) A train of mass 200 kg moves with a velocity of 100 m/s to the right. The train collides with a car of mass 50 kg which is stopped on the track. After the collision, the train comes to a stop. Solve the final velocity of the car.
A
400 m/s
B
300 m/s
C
500 m/s
D
200 m/s
4) Tony Siragusa has a mass of 154 kg and runs with a velocity of 2 m/s. He hits 91 kg Joe Namath who is running towards him with a velocity of 4 m/s. Solve for the final velocity of the entangled players.
A
-.544 m/s
B
-.228 m/s
C
-.850 m/s
D
-.615 m/s
5) A 90 kg student and 60 kg student are on roller skates at rest; face to face. After they push off from each other the 90 kg student moves to the left with a velocity of 3 m/s. Solve for the final velocity of the 60 kg student.
A
7.3 m/s
B
4.5 m/s
C
3.0 m/s
D
5.8 m/s
6) A 92 kg fullback, running at 5.0 m/s, attempts to dive directly across the goal line for a touchdown. Just as he reaches the line he is met head-on by two 150-kg linebackers moving at 2.0 m/s. Solve for the velocity of the entangled players.
A
-.357 m/s
B
-.284 m/s
C
-140 m/s
D
-.66 m/s
7) During a collision, the forces on the objects are...
A
more for the heavier object
B
equal to on both objects
C
more on the light object
D
always zero
8) Which has more momentum?
A
a parked dump truck
B
a train as rest
C
a baby crawling across the floor
D
a baby sleeping
9) A 20 g bullet hit a target and slows to a stop from a velocity of 2500 ft/s in .3 seconds. Which what force does the bullet his the target?
A
0 N
B
50.8 N
C
16666.67N
D
166.67 N
10) A 1650 kg car travels with a velocity of 30 miles/hour and hits a wall. The wall applies a force and causes the car to travel backwards at a speed of 2 mph in 0.5 seconds. What force does the wall apply on the car?
A
3.14 N
B
-56 N
C
25 N
D
-28.6 N
*select an answer for all questions
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