Work Energy Theorem

Front

What is the Work-Energy Theorem?

Back

The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy.

Front

Define the Law of Conservation of Energy.

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is work in physics?

Back

Work is defined as the product of the net force acting on an object and the distance over which that force is applied.

Front

How is kinetic energy calculated?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the unit of work?

Back

The unit of work is the joule (J).

Front

If a 10 kg box is accelerated from 2.0 m/s to 4.0 m/s, how much work is done?

Back

20 J.

Front

What is the formula for calculating work?

Back

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

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy, specifically kinetic energy.

Front

How much force is needed to push a 12 kg book to a final velocity of 10 m/s over 6 m?

Back

100 N.

Front

What is the kinetic energy of a 25,000 g object moving at 2.5 m/s?

Back

78.125 J.