TEST- Forces, Gravity, Friction and Air Resistance

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that cause an object to accelerate or change its motion. They occur when the net force acting on an object is not zero.

Front

What is friction force?

Back

Friction force is the force that opposes the motion of an object. It acts in the opposite direction to the movement.

Front

What type of energy is produced by rubbing two sticks together?

Back

Heat energy is produced when two sticks are rubbed together due to friction.

Front

What is a streamlined shape?

Back

A streamlined shape is a design that reduces resistance to the flow of air or water, allowing objects to move more efficiently.

Front

What is air resistance?

Back

Air resistance is a type of friction that occurs when air pushes against a moving object, causing it to slow down.

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 the difference between balanced and unbalanced forces?

Back

Balanced forces do not change an object's motion, while unbalanced forces cause an object to accelerate.

Front

What factors affect friction?

Back

Friction is affected by the surface texture of the objects in contact and the force pressing them together.

Front

What is the normal force?

Back

The normal force is the support force exerted upon an object that is in contact with a stable surface, acting perpendicular to the surface.

Front

How does surface area affect air resistance?

Back

An increase in surface area increases air resistance, as more air molecules collide with the object.