Force and Motion Quiz

A _____________ is a push or a pull. Forces, such as _____________ and friction, affect the way things move. ______________ is a change in position.

• gravity, force, motion

• motion, gravity, force

• force, gravity, motion

Answer explanation

A force is a push or pull, and gravity is a type of force that affects movement. Motion refers to the change in position of an object. Thus, the correct sequence is: force, gravity, motion.

All objects have forces acting on them, even objects that are not moving.

• True

• False

Answer explanation

True. All objects experience forces, such as gravity and friction, regardless of their motion. Even stationary objects have forces acting on them, balancing each other.

What is the net force in this picture?

• 7N

• 10N

• 3N

• 17N

Answer explanation

The net force is calculated by subtracting opposing forces. If the forces acting on the object result in a net force of 3N, then the correct answer is 3N, as it reflects the total unbalanced force.

When the net force is __________, an object is not moving.

• zero

• positive

• negative

Answer explanation

When the net force is zero, it means that all forces acting on the object are balanced, resulting in no acceleration. Therefore, the object remains at rest or continues to move at a constant velocity, indicating it is not moving.

Which force pulls objects toward the Earth?

• Friction

• Gravity

• Velocity

Answer explanation

The force that pulls objects toward the Earth is gravity. It is a natural phenomenon that attracts two bodies with mass towards each other, with Earth exerting a strong gravitational pull on objects near its surface.

Which force makes objects resist moving against each other?

• Friction

• Gravity

• Velocity

Answer explanation

Friction is the force that opposes the relative motion of two surfaces in contact. It makes objects resist moving against each other, which is why it is the correct answer.

A bowling ball thrown with the same force will go faster in a bowling alley than on a carpet because of ...

• Friction

• Gravity

• Velocity

Answer explanation

A bowling ball goes faster on a bowling alley than on a carpet due to friction. The smooth surface of the alley reduces friction, allowing the ball to maintain higher speed compared to the rougher carpet, which increases friction.

Newton's First Law says an object at rest will stay at rest unless a force acts on it. This is called _________________.

• Acceleration

• Reaction

• Inertia

Answer explanation

Inertia is the property of an object that causes it to remain at rest or in uniform motion unless acted upon by an external force. This concept is central to Newton's First Law of Motion.

Newton's Second Law says that if you use more force, things will move faster, or have greater ___________________.

• Acceleration

• Reaction

• Inertia

Answer explanation

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it. Therefore, using more force results in greater acceleration, making 'Acceleration' the correct choice.

Newton's Third Law says that if you push something, it pushes back the same amount, or has an equal and opposite _______________.

• Acceleration

• Reaction

• Inertia

Answer explanation

Newton's Third Law states that for every action, there is an equal and opposite reaction. Therefore, when you push something, it exerts an equal force back on you, which is referred to as the reaction.