Presentation on theme: "Momentum and Collision Practice Problems and Answers"— Presentation transcript:
1Momentum and Collision Practice Problems and Answers
2PROBLEM 1A 2250 kg pickup truck has a velocity of 25 m/s to the east. What is the momentum of the truck?
3PROBLEM 2What velocity must a car with a mass of 1210 kg have in order to have the same momentum as the pickup truck?
4PROBLEM 3A baseball of mass 0.14 kg is moving at 35 m/s. A) Find the momentum of the baseball.B) Find the velocity of a bowling ball, mass 7.26 kg, would have if its momentum is the same as the baseball.
9PROBLEM 5 A snowmobile has a mass of 250 kg. A constant force is exerted on it for 60 s. The snowmobile’s initial velocity is 6 m/s and its final velocity is 28 m/s. A) what is the change in momentum? B) what is the magnitude of the force exerted?
11PROBLEM 6The brakes exerted a 640 N force on a car weighing N and moving at 20 m/s. The car finally stops. A) What is the car’s mass? B) What is the car’s initial momentum? C) What is the change in the car’s momentum?D) How long does the braking force act on the car to bring it to a halt?
22PROBLEM 11Glider A of mass .355 kg moves along a frictionless air track with a velocity of .095 m/s. It collides with a glider B of mass .710 kg moving in the same direction at a speed of .045 m/s. After collision glider A continues in the same direction with a velocity of .035 m/s. What is the velocity of glider B after collision?
29PROBLEM 14A 35 g bullet moving at 475m/s strikes a 2.5 kg wooden block. The bullet passes through the block, leaving at 275 m/s. The block was at rest when it was hit. How fast is it moving when the bullet leaves ?
33PROBLEM 16A 4 kg model rocket is launched, shooting 50g fuel from its exhaust at an average velocity of 625 m/s. What is the velocity of the rocket after the fuel has burned? (Ignore effects of gravity and air resistance)
35PROBLEM 17Two campers dock a canoe. One camper steps on the dock. This camper has a mass of 80 kg and moves forward at 4 m/s. With what speed and direction do the canoe and the other camper move if their combined mass is 110 kg?
38PROBLEM 18Two students on roller skates stand face to face, then push each other away. One student has a mass of 90 kg, the other 60 kg. Find the ratio of their velocities just after their hands lose contact. Which student has the greater speed?
40PROBLEM 19Block A with a mass 12 kg moving at 2.4 m/s makes a perfect elastic head-on collision with a block B, mass 36 kg, at rest. Find the velocities of the two blocks after collision. Assume all motion is in one dimension.
45PROBLEM 21A 5g bullet is fired with a velocity of 100 m/s toward a 10 kg stationary solid lock resting on a frictionless surface. What is the change in momentum of the bullet if it becomes embedded in the block?
48PROBLEM 22A 50 g ball is struck with a club. The force on the ball varies from zero when contact is made up to some maximum value (when the ball is deformed) and then back to zero when the ball leaves the club. Assume the ball leaves the club face with a velocity of +44 m/s. Estimate the impulse due to the collision.
50PROBLEM 23In a particular car test, a 1.50 x 103 kg automobile collides with a wall. The initial and final velocities of the automobile are –15 m/s and 2.6 m/s respectively. If the collision lasts for 0.150s, find the impulse due to collision and the average force exerted on the automobile.
52PROBLEM 24A baseball player attempts to use a pitching machine to help him improve his batting average. He places the 50 kg machine on a frozen pond. The machine fires a 0.15 kg baseball horizontally with a speed of 36 m/s. What is the recoil velocity of the machine?
54PROBLEM 25An 1800 kg luxury sedan stopped at a traffic light is struck from the rear by a compact car with a mass of 900 kg. The two cars became entangled as a result of the collision. If the compact car was moving at a velocity of +20 m/s before the collision, what is velocity of the entangled mass after the collision?