Front

What is a force?

Back

A force is a push or pull that can change the motion of an object.

Front

What is motion?

Back

Motion is any change in position of an object.

Front

What are balanced forces?

Back

Balanced forces are forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that are not equal and can cause an object to move or change its motion.

Front

What is gravity?

Back

Gravity is the force that pulls objects toward each other, such as the Earth pulling objects toward its center.

Front

What is friction?

Back

Friction is a force that opposes motion between two surfaces in contact.

Front

How does the steepness of a ramp affect the force on a car?

Back

The steeper the ramp, the greater the force of gravity acting on the car.

Front

What is acceleration?

Back

Acceleration is the rate at which an object changes its velocity.

Front

What is the role of a pulley?

Back

A pulley is a simple machine that helps lift heavy objects by changing the direction of the force applied.

Front

What is the effect of surface material on friction?

Back

Different materials create different amounts of friction; smoother surfaces like tile create less friction than rough surfaces like carpet.