Momentum Answers

The diagram shows two balls before they collide.

Football helmets are made with padding that helps reduce head injuries when a player collides with an object. Which best explains how the padding reduces injuries?

Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg • m/s. The bike hits a rock, which stops it completely and throws Sheila forward onto the pavement.If there is no net force on the system, what is Sheila’s velocity immediately after she is thrown from the bike?

A 50 kg pitcher throws a baseball with a mass of 0.15 kg. If the ball is thrown with a positive velocity of 35 m/s and there is no net force on the system, what is the velocity of the pitcher?

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force?

The law of conservation of momentum states that, if left alone, what happens to the total momentum of two interacting objects that make up a system?

Which formula can be used to express the law of conservation of momentum, where p = momentum?

A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles?

The chart shows masses and velocities of four objects.

A NASA explorer spacecraft with a mass of 1,000 kg takes off in a positive direction from a stationary asteroid.If the velocity of the spacecraft is 250 m/s and the asteroid is pushed back –25 m/s, what is the mass of the asteroid? Assume there is no net force on the system.