Module 4 Test

Front

What is kinetic energy?

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

How is gravitational potential energy calculated?

Back

Gravitational potential energy (GPE) is calculated using the formula GPE = mgh, where m is mass, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height.

Front

What is the formula for work done?

Back

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

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. It indicates how much a machine multiplies force.

Front

How do you calculate kinetic energy of an object?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is the relationship between height and gravitational potential energy?

Back

Gravitational potential energy increases with height. The higher an object is lifted, the more gravitational potential energy it gains.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

Front

What does a pulley system do?

Back

A pulley system is used to lift heavy objects by changing the direction of the force applied and can provide mechanical advantage.

Front

If a force of 4.2 N is applied over a distance of 0.50 m, how much work is done?

Back

Work done = 4.2 N * 0.50 m = 2.1 J.

Front

What is the significance of the acceleration due to gravity?

Back

The acceleration due to gravity (approximately 9.81 m/s²) is the rate at which an object accelerates towards the Earth when falling.