Physics Concepts: Momentum and Impulse

What is the primary reason an egg breaks when dropped from a height?

• The egg's shape is not aerodynamic.

• The force experienced by the egg is too large due to a short stopping time.

• The egg's momentum is too high.

• The egg is too heavy.

Which of the following best describes momentum?

• The speed of an object.

• The mass of an object.

• The product of an object's mass and velocity.

• The direction of an object's movement.

How can two objects with different masses have the same momentum?

• By having the same velocity.

• By having different velocities that compensate for their mass difference.

• By having the same mass.

• By being stationary.

How did Newton originally describe his second law?

• As the force being equal to mass times velocity.

• As the rate of change of momentum being equal to the net force.

• As the force being equal to mass times speed.

• As the rate of change of speed being equal to the net force.

What is impulse?

• The change in velocity over time.

• The product of mass and acceleration.

• The product of force and time.

• The change in mass over time.

Why do sports players draw their hands back when catching a ball?

• To reduce the force experienced by increasing the time of impact.

• To decrease the time of impact.

• To increase the speed of the ball.

• To make the catch look more impressive.

What happens to the force experienced by an egg when it is dropped on a sponge?

• The force becomes zero.

• The force remains the same.

• The force decreases because the time to stop is increased.

• The force increases because the sponge is soft.

What was the purpose of developing crumple zones in cars?

• To make cars heavier.

• To absorb energy and reduce the force experienced by passengers.

• To increase the speed of cars.

• To make cars more aerodynamic.

How do airbags help in reducing injuries during a collision?

• By decreasing the time of impact.

• By making the car lighter.

• By increasing the speed of the car.

• By increasing the time over which the head's momentum changes.

Why is initial velocity important in surviving a collision?

• Because it determines the color of the car.

• Because it affects the g-forces experienced during impact.

• Because it affects the car's fuel efficiency.

• Because it changes the car's weight.