Work, Power, Energy

Front

What is kinetic energy?

Back

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

Front

What is the formula to calculate work done?

Back

Work done (W) is calculated using the formula W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Front

How does velocity affect kinetic energy?

Back

Velocity has a squared relationship with kinetic energy, meaning that if velocity doubles, the kinetic energy increases by a factor of four.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

Front

If a 2.1 kg soccer ball is kicked at 30 m/s, what is its kinetic energy?

Back

The kinetic energy of the soccer ball is 945 J.

Front

What is the relationship between work, force, and distance?

Back

Work is the product of force and the distance over which the force is applied in the direction of the force.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, commonly gravitational potential energy, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate the distance moved if work and force are known?

Back

Distance (d) can be calculated using the formula d = W/F, where W is work done and F is force.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.