Science quiz - laws of motion

According to Newton's first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by a(n):

• Unbalanced force

• Balanced force

• External force

• Inertia force

The SI unit of force is:

• Joule

• Kelvin

• Watt

• Newton

Which law of motion explains the relationship between force, mass, and acceleration?

• Newton's First law

• Newton's second law

• Newton's third law

• Newton's law of gravitation

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied and inversely proportional to its

• Momentum

• Velocity

• Acceleration

• Mass

When a net force is applied to an object, it will always produce a change in its:

• Velocity

• Speed

• Mass

• Postion

According to Newton's third law of motion, for every action, there is an equal and opposite:

• Reaction

• Force

• Acceleration

• Inertia

When a person jumps off a boat onto the shore, the boat tends to move in the opposite direction due to:

• First law of motion

• Second law of motion

• Third law of motion

• Gravitation law

If you push a box with a force of 20 N and it accelerates at 4 m/s², what is its mass?

• 5 kg

• 8 kg

• 16 kg

• 80 kg

Which of the following statements is true regarding inertia?

• It is a force that opposes motion.

• It is the property of an object to resist changes in its state of motion

• It is measure of the gravitational force acting on an object

• It is rate of change of velocity

The force of gravity acting on an object is an example of which type of force?

• Frictional force

• Applied force

• Normal force

• Gravitation force