Science Quiz

1. Which of the following is a contact force?

• Magnetic force

• Gravitational force

• Friction

• Electrostatic force

Force can change the

• Shape of an object

• Direction of motion

• Speed of object

• All of the above

A moving object stops when a force is applied in the

• Same direction as motion

• Perpendicular direction

• Opposite direction of motion

• None of these above

What is the Si unit of force?

• Kilogram

• Joule

• Newton

• Watt

Which force always opposes motion

• Magnetic force

• Electrostatic force

• Friction

• Gravitational Force

Action and reaction forces are:

• Equal in magnitude and act on the same body

• Unequal and act in the same direction

• Equal in magnitude and act on different bodies

• One is always greater than the other

Which law explains why passengers fall forward when a car suddenly stops?

• Newton’s First Law

• Newton’s Second Law

• Newton’s Third Law

• Law of friction

The tendency of a body to resist change in its state of motion is called:

• Acceleration

• Friction

• Inertia

• Force

If mass is constant, force is directly proportional to

• Area

• Volume

• Acceleration

• Speed

A ball is thrown upward and returns to the thrower. The force that pulls it down is

• Friction

• Muscular force

• Magnetic force

• Gravity