Work/Energy Theorem

Front

What is the Work-Energy Theorem?

Back

The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy.

Front

What is kinetic energy (KE)?

Back

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

Front

What is potential energy (PE)?

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

What is the formula for work done (W)?

Back

Work done is calculated as W = Fd cos(θ), where F is the force applied, d is the displacement, and θ is the angle between the force and displacement.

Front

What happens to kinetic energy when work is done on an object?

Back

When work is done on an object, its kinetic energy changes; if work is positive, kinetic energy increases, and if work is negative, kinetic energy decreases.

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 or from that object.

Front

What is the significance of friction in work and energy?

Back

Friction does negative work on an object, reducing its kinetic energy and converting it into thermal energy.

Front

How does an object sliding down a frictionless ramp relate to energy?

Back

As an object slides down a frictionless ramp, its potential energy is converted into kinetic energy, maintaining the total mechanical energy.

Front

What is the effect of increasing speed on the kinetic energy of an object?

Back

Increasing the speed of an object increases its kinetic energy exponentially, as KE is proportional to the square of the velocity.

Front

What is the unit of work and energy?

Back

The unit of work and energy is the Joule (J).