Third Periodical Test in Science

It is a force that results when two objects interact physically through direct contact.

• non-contact force

• contact force

• gravity

• static electricity

A contact force that is applied to an object by a person or another object.

• applied force

• normal force

• contact force

• tension

A contact force exerted by a surface perpendicular to an object resting on it to support its weight. It is also called the support force.

• applied force

• normal force

• contact force

• tension

A contact force that results when an object, like a rope or string, is pulled in opposite directions by two forces.

• applied force

• friction

• contact force

• tension

This force occurs when two surfaces rub against each other and causes objects to slow down or stop.

• applied force

• friction

• contact force

• tension

How does friction affect the motion of an object?

• It slows it down.

• It speeds it up.

• It makes it fall to the ground.

• It causes it to float.

Which type of friction occurs between objects that are in contact but not moving?

• kinetic friction

• rolling friction

• static friction

• fluid friction

Which type of friction occurs when an object moves through a fluid, such as air or water?

• rolling friction

• kinetic friction

• static friction

• fluid friction

In cooking, which technique can be used to reduce friction and prevent food from sticking to the pan?

• Applying cooking oil or butter

• Using a smoother pan surface

• Increasing the cooking temperature

• Decreasing the cooking time

Which of the following methods is effective for reducing friction in machinery and equipment?

• Adding lubricants

• Tightening screws and bolts

• Increasing surface roughness

• Applying pressure on the surfaces