Energy, power and work

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it acts. It is measured in joules (J).

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) Where W is in joules, F is in newtons, and d is in meters.

Front

What is power in physics?

Back

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

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t) Where P is in watts, W is in joules, and t is in seconds.

Front

What is kinetic energy (KE)?

Back

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

Front

What is the unit of energy?

Back

The unit of energy is the joule (J).

Front

How do you calculate the mass of an object using its kinetic energy?

Back

Rearranging the kinetic energy formula: m = 2KE / v².

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy. When work is done, energy is transferred to or from the object.

Front

What is the significance of a 60 watt light bulb?

Back

A 60 watt light bulb consumes 60 joules of electrical energy per second.

Front

How do you calculate energy transformed by a device?

Back

Energy (E) = Power (P) × Time (t) Where E is in joules, P is in watts, and t is in seconds.