Work-Energy Theorem

Front

What does the Work-Kinetic Energy Theorem state?

Back

The net work done by a net force acting on an object is equal to the change in the kinetic energy of the object.

Front

What is the formula to calculate work done when force and distance are known?

Back

W = F ⋅ d

Front

How is kinetic energy (KE) defined?

Back

Kinetic energy is defined as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the relationship between work and kinetic energy?

Back

The work done on an object is equal to the change in its kinetic energy.

Front

If the velocity of an object triples, by how many times does its kinetic energy increase?

Back

9 times.

Front

What is the formula to find the work done when given initial and final kinetic energy?

Back

W = KE_f - KE_i.

Front

How do you calculate the force applied to an object if you know its mass and acceleration?

Back

Use Newton's second law: F = m * a.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

If a 10 kg box is accelerated from 2 m/s to 4 m/s, how much work is done?

Back

60 J.

Front

What is the formula to calculate distance when force, mass, and initial and final velocities are known?

Back

F ⋅ d = 1/2 mv_f² - 1/2 mv_i².