Physics Review: Work Energy Power Test

Front

What is the formula for gravitational potential energy?

Back

Gravitational Potential Energy (PE) = m * g * h, where m is mass (kg), g is acceleration due to gravity (9.81 m/s²), and h is height (m).

Front

Calculate the gravitational potential energy of a 1.5 kg object at a height of 8 meters.

Back

PE = 1.5 kg * 9.81 m/s² * 8 m = 117.6 J.

Front

What is the definition of Power in physics?

Back

Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

If an engine generates 1200 W of power, how much work can it do in 20 seconds?

Back

Work = Power * Time = 1200 W * 20 s = 24000 J.

Front

What is the formula for calculating work done?

Back

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

Front

A force of 60 N is applied to push a sled. If 8000 J of work is done, what is the distance pushed?

Back

Distance = Work / Force = 8000 J / 60 N = 133.33 m.

Front

Define Potential Energy.

Back

The energy that an object stores due to its position or state.

Front

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

Back

The unit of work is the joule (J).

Front

Calculate the work done when a force of 600 N is applied to push a 25 kg crate a distance of 4.5 m.

Back

Work = Force * Distance = 600 N * 4.5 m = 2700 J.

Front

What is the relationship between work, energy, and power?

Back

Work is the transfer of energy, and power is the rate at which work is done.