physics

What is Newton's First Law of Motion?

An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by a net external force.

What is the formula for calculating force?

Force (F) is calculated using the formula F = mass (m) × acceleration (a).

Define acceleration.

Acceleration is the rate of change of velocity per unit time.

What is the principle of conservation of energy?

Energy cannot be created or destroyed; it can only be transformed from one form to another.

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

The unit of force is the Newton (N).

Explain the term 'momentum'.

Momentum is the product of an object's mass and its velocity, represented as p = m × v.

What is the difference between mass and weight?

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

What does the term 'work' mean in physics?

Work is done when a force causes an object to move in the direction of the force and is calculated as work = force × distance.

Define energy transfer.

Energy transfer refers to the process of energy moving from one system or object to another.

What is the role of a fuse in an electrical circuit?

A fuse acts as a safety device, interrupting the circuit if the current exceeds a certain level to prevent overheating.