Energy, Work, and Power

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it acts. It is calculated using the formula: Work = Force × Distance (W = F × d). The unit of work is joules.

Front

How is kinetic energy defined?

Back

Kinetic energy is the energy an object possesses due to its motion. It is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What factors affect gravitational potential energy?

Back

Gravitational potential energy depends on the height of an object above the ground and its mass. It is calculated using the formula: PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the relationship between speed and kinetic energy?

Back

The faster an object moves, the more kinetic energy it has. Kinetic energy increases with the square of the speed.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, an arrow pulled back in a bow has potential energy.

Front

What is the formula for calculating work done?

Back

The formula for calculating work done is Work = Force × Distance (W = F × d).

Front

What is the unit of work?

Back

The unit of work is the joule (J).

Front

What is the significance of the height in gravitational potential energy?

Back

Height is significant in gravitational potential energy because it determines how much energy is stored due to an object's position above the ground.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is the energy of motion, while potential energy is the stored energy based on an object's position or condition.

Front

How does mass affect kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object. Increasing the mass increases the kinetic energy if the speed remains constant.