Work, Energy, and Power

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 unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

How is power defined in terms of work and time?

Back

Power (P) = Work (W) / Time (t).

Front

What is the unit of power in the International System of Units (SI)?

Back

The unit of power is the Watt (W), where 1 Watt = 1 Joule/second.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic Energy (KE) = 1/2 × mass (m) × velocity (v)².

Front

What is gravitational potential energy and how is it calculated?

Back

Gravitational Potential Energy (GPE) = mass (m) × gravitational acceleration (g) × height (h).

Front

What factors affect gravitational potential energy?

Back

Gravitational potential energy depends on the height and mass of the object.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

If a force of 12.5 N is applied over a distance of 56.0 m, how much work is done?

Back

Work = 12.5 N × 56.0 m = 700 J.

Front

How much time is required to do 720 J of work at a power of 90 W?

Back

Time = Work / Power = 720 J / 90 W = 8 sec.