CH 6 Review

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in a system.

Front

At which position is the roller coaster car's mechanical energy 100% potential energy?

Back

Position A, at the highest point of the track.

Front

What is the formula for calculating force during a collision?

Back

The formula is Ft = mv, where Ft is the force, m is mass, and v is velocity.

Front

If a 1,000 kg truck moving at 10 m/s stops in 0.1 seconds, what is the magnitude of the force exerted on it?

Back

100,000 Newtons.

Front

What is kinetic energy and how is it calculated?

Back

Front

How much kinetic energy is lost when a 6-kg ball with an initial speed of 5 m/s sticks to a wall?

Back

75 Joules.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, expressed as p = mv.

Front

If a runner has a momentum of 670 kg m/s and is traveling at a velocity of 9.0 m/s, what is his mass?

Back

74 kg.

Front

What is an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

In an elastic collision, if sphere 1 is moving and sphere 2 is static, what happens to sphere 2's velocity after the collision?

Back

Sphere 2 will move with a velocity determined by the conservation of momentum.