Work-Energy-Momentum

Front

What is the Work-Energy Theorem?

Back

The Work-Energy Theorem states that the work done by the net force acting on an object is equal to the change in its kinetic energy (W_net = ΔKE).

Front

Define impulse in physics.

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as the product of the average force and the time duration (Impulse = F_avg * Δt).

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity (p = m * v). It is a vector quantity, having both magnitude and direction.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 0.5 * m * v^2, where m is mass and v is velocity.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event.

Front

What is the formula for calculating work done by a force?

Back

Work (W) is calculated using the formula W = F * d * cos(θ), where F is the force applied, d is the distance moved in the direction of the force, and θ is the angle between the force and the direction of motion.

Front

Explain elastic collision.

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved. The objects bounce off each other without any loss of kinetic energy.

Front

What is gravitational potential energy?

Back

Gravitational potential energy (PE) is the energy an object possesses due to its position in a gravitational field, calculated as PE = m * g * h, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you find the height of an object using kinetic energy?

Back

To find the height (h) of an object using its kinetic energy (KE), use the formula h = KE / (m * g), where m is mass and g is the acceleration due to gravity.

Front

What is the relationship between work and kinetic energy?

Back

The relationship is defined by the Work-Energy Theorem, which states that the work done on an object is equal to the change in its kinetic energy (W = ΔKE).