Understanding Forces and Motion

Front

What is kinetic energy?

Back

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

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is often associated with gravitational potential energy, calculated as PE = mgh, where m is mass, g is gravitational acceleration, and h is height.

Front

What is the formula for calculating work done?

Back

Work done (W) is calculated using the formula W = Fd 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

What factors affect gravitational potential energy?

Back

Gravitational potential energy is affected by the mass of the object, the height above the ground, and the gravitational acceleration. Speed does not affect gravitational potential energy.

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 that object, resulting in a change in its kinetic or potential energy.

Front

How does air resistance affect falling objects?

Back

Air resistance opposes the motion of falling objects, reducing their acceleration and final velocity compared to free fall without air resistance.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another. The total energy in a closed system remains constant.

Front

What is the difference between scalar and vector quantities?

Back

Scalar quantities have only magnitude (e.g., mass, temperature), while vector quantities have both magnitude and direction (e.g., force, velocity).

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 in the direction of the force.

Front

What is the effect of increasing mass on kinetic energy?

Back

Increasing the mass of an object while keeping its velocity constant will increase its kinetic energy, as kinetic energy is directly proportional to mass.