Physics Semester 1 Review 2 of 2

Front

For every action force there exists a(n) ____________________ reaction force.

Back

Equal and opposite.

Front

What kind of energy is in a moving skateboard?

Back

Kinetic energy.

Front

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

Back

60 J.

Front

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

Back

100 J.

Front

What is the relationship between gravitational force (Fg) and distance?

Back

Gravitational force decreases with the square of the distance between two objects.

Front

Define Newton's First Law of Motion.

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the formula for calculating work done?

Back

Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or configuration.

Front

Explain the concept of conservation of energy.

Back

Energy cannot be created or destroyed, only transformed from one form to another.