1st Semester Exam 2024

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. For example, a rock at the edge of a cliff has potential energy because of its height.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its velocity.

Front

What happens when like poles of magnets are brought together?

Back

Like poles of magnets repel each other. For example, two north poles will push away from each other.

Front

What is a pulley?

Back

A pulley is a simple machine that consists of a wheel on an axle or shaft designed to support movement and change the direction of force. It is commonly used to lift heavy objects.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can occur due to an increase or decrease in speed or a change in direction.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object. It occurs when two surfaces come into contact with each other.

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads.

Front

What is the formula for calculating potential energy?

Back

Potential energy (PE) can be calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.