8th Physical Science Review

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate in the direction of the net force. It occurs when two forces acting on an object are not equal in size.

Front

What is a balanced force?

Back

Balanced forces are two or more forces acting on an object that are equal in size but opposite in direction, resulting in no change in motion.

Front

What happens when forces are balanced?

Back

When forces are balanced, the net force is zero, and the object remains at rest or continues to move at a constant velocity.

Front

What is net force?

Back

Net force is the overall force acting on an object after all the individual forces are combined. It determines the object's acceleration.

Front

What is gravity?

Back

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

Front

What is the effect of gravity on a falling object?

Back

Gravity causes a falling object to accelerate downward at a rate of approximately 9.8 m/s².

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the motion of an object, acting in the opposite direction to the movement.

Front

What is the difference between mass and weight?

Back

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

Front

How do you calculate net force?

Back

Net force can be calculated by adding all the forces acting on an object, taking into account their direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, which can occur due to a change in speed or direction.