Forces and motion

Front

What is a force?

Back

A force is a push or pull that can cause an object to move, change its speed, or change its direction.

Front

What is motion?

Back

Motion is the change in position of an object over time.

Front

What is mass?

Back

Mass is the amount of matter in an object, usually measured in kilograms (kg).

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, calculated as mass times the acceleration due to gravity (W = m × g).

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What is gravity?

Back

Gravity is the force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is thrust?

Back

Thrust is the force that propels an object forward, such as the force produced by a rocket engine.

Front

What is acceleration?

Back

Acceleration is the rate at which an object's velocity changes over time.

Front

What is the relationship between mass and acceleration?

Back

According to Newton's second law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = m × a).

Front

What is the role of a net force?

Back

The net force is the overall force acting on an object, determining its motion. If the net force is zero, the object remains at rest or in uniform motion.