Work and Power REVIEW

Front

What is the equation for power?

Back

Power (P) is defined as the rate at which work is done. The equation is P = W/t, where W is work and t is time.

Front

What is the unit for time?

Back

The unit for time is seconds (s).

Front

What is the unit for mass?

Back

The unit for mass is kilograms (kg).

Front

What is the formula to calculate work?

Back

Work (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 relationship between work and energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object.

Front

What is the definition of kinetic energy?

Back

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

Front

What is the definition of potential energy?

Back

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

Front

What is the unit for work?

Back

The unit for work is Joules (J).

Front

What does it mean when work is not done?

Back

Work is not done when there is no movement in the direction of the force applied, such as when an object does not move despite a force being applied.

Front

What is the significance of forces being perpendicular to motion?

Back

When forces are perpendicular to the direction of motion, they do not do work on the object, as work is only done by forces that cause displacement in the direction of the force.