Impact forces and Safety

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Tags

NGSS.HS-PS2-2

The Law of Conservation of Momentum states that the amount of momentum in a system is ___________________ before and after a collision.

• greater

• decreased

• the same

• unknown

Tags

NGSS.HS-PS2-2

A trampoline increases __________________, which in turn decreases _____________________.

• force / time

• mass / weight

• time / force

• acceleration / velocity

A car has 10,800 kgm/s of momentum as it collides with a waste skip AT REST. How much TOTAL MOMENTUM will the car and skip have after collision?

• Less than 10,800 kgm/s

• More than 10,800 kgm/s

• The same. 10,800 kgm/s

• Not enough information.

A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball.

• 55 kg m/s

• 100 kg m/s

• 250 kg m/s

• 500 kg m/s

To change the momentum of an object, a ____________ must be applied to it for a given period of ________.

• time, force

• mass, velocity

• force, time

• mass, time

Tags

NGSS.HS-PS2-1

Two identical motorcycles are travelling at the same velocity down the highway when they skid off the road. Motorcycle #1 crashes into a concrete barrier and motorcycle #2 crashes in a very large bush. Which one experiences a greater force?

• Motorcycle #1

• Motorcycle #2

• They both experience the same force

When the velocity of an object is doubled, its momentum...

• remains unchanged in accord with the conservation of momentum.

• doubles.

• quadruples.

• decreases.

A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less

• momentum
• velocity
• mass

Tags

NGSS.HS-PS2-2

A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving West. What is the total momentum of the system?

• 0 kgm/s

• 30 kgm/s

• 50 kgm/s

• 10 kgm/s