WORK KINETIC ENERGY THEOREM

Front

What is the Work-Kinetic Energy Theorem?

Back

The Work-Kinetic Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. Mathematically, it is expressed as W = ΔKE.

Front

Define work in physics.

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is calculated as W = F * d * cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is kinetic energy?

Back

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

Front

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

Back

The change in kinetic energy is calculated as ΔKE = KE_f - KE_i, where KE_f is the final kinetic energy and KE_i is the initial kinetic energy.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. Common types include gravitational potential energy and elastic potential energy.

Front

What is the formula for gravitational potential energy (PE)?

Back

Gravitational potential energy is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height above a reference point.

Front

When is work done on an object?

Back

Work is done on an object when a force causes the object to move in the direction of the force. This typically occurs when the object is in motion.

Front

What is the relationship between work and energy?

Back

Work and energy are closely related; work done on an object results in a change in its energy. Specifically, work can transfer energy to or from an object.

Front

How much work is done when lifting an object vertically?

Back

The work done when lifting an object vertically is equal to the gravitational potential energy gained by the object, calculated as W = mgh.

Front

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

Back

The unit of work in the SI system is the joule (J), which is defined as the work done when a force of one newton displaces an object by one meter.