Work-Energy Theorem

Front

What does the Work-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

How is kinetic energy (KE) calculated?

Back

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

Front

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

Back

The kinetic energy increases by 9 times.

Front

What is the relationship between work done (W) and kinetic energy (KE)?

Back

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

Front

What is the formula to calculate work done when a force is applied over a distance?

Back

Work done (W) is calculated using the formula W = F ⋅ d, where F is the force and d is the distance.

Front

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

Back

The unit of work is the Joule (J).

Front

How do you find the distance (d) when you know mass (m), final velocity (Vf), initial velocity (Vi), and force (F)?

Back

Use the equation: F⋅d = 1/2 mvf² - 1/2 mvi².

Front

What is the significance of the net force in the Work-Energy Theorem?

Back

The net force is the total force acting on an object, and it determines the net work done on the object, which affects its kinetic energy.

Front

What is the formula for calculating force (F) if you know mass (m) and acceleration (a)?

Back

Force is calculated using Newton's second law: F = m ⋅ a.

Front

How do you calculate the change in kinetic energy (ΔKE)?

Back

ΔKE is calculated as ΔKE = KE_final - KE_initial.