06c - Calculating Kinetic and Potential Energy

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is often associated with gravitational energy, which depends on the height of the object above the ground.

Front

What is kinetic energy?

Back

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

Front

What is the formula for calculating gravitational potential energy?

Back

The formula for gravitational potential energy (PE) is PE = mgh, where m is mass (in kg), g is the acceleration due to gravity (approximately 9.8 m/s²), and h is height (in meters).

Front

How do you calculate the kinetic energy of an object?

Back

To calculate the kinetic energy (KE) of an object, use the formula KE = 1/2 mv², where m is the mass of the object in kilograms and v is its velocity in meters per second.

Front

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

Back

The unit of energy in the SI system is the Joule (J).

Front

If a battery stores energy, what type of energy is it storing?

Back

A battery stores potential energy.

Front

What is the relationship between mass and potential energy?

Back

The potential energy of an object increases with its mass. The greater the mass, the more potential energy it has at a given height.

Front

How does height affect potential energy?

Back

Potential energy increases with height. The higher an object is above the ground, the more potential energy it possesses.

Front

What is the maximum kinetic energy of a polar bear with a mass of 500 kg and a top speed of 15.56 m/s?

Back

The maximum kinetic energy can be calculated using KE = 1/2 mv². For a polar bear with a mass of 500 kg and speed of 15.56 m/s, KE = 1/2 * 500 * (15.56)² = 60500 J.

Front

Calculate the potential energy of a 20 kg clock at a height of 45 m. (Use g = 9.8 m/s²)

Back

PE = mgh = 20 kg * 9.8 m/s² * 45 m = 8820 J.