Understanding Newton's First Law of Motion

What does Newton's First Law of Motion state about an object with no net external force acting on it?

• It will change its state of motion.

• It will move in a circular path.

• It will remain at rest or in uniform motion.

• It will accelerate.

In the example of books on a table, what is the net external force acting on the books?

• Zero

• 100 Newtons downward

• 100 Newtons upward

• 200 Newtons upward

What happens to a paratrooper when the downward force of gravity equals the upward force of air resistance?

• The paratrooper falls with uniform velocity.

• The paratrooper moves upward.

• The paratrooper accelerates downward.

• The paratrooper stops moving.

What is the term used to describe the constant speed at which a paratrooper falls when forces are balanced?

• Average velocity

• Terminal velocity

• Maximum velocity

• Initial velocity

Why does a paratrooper continue to fall downward even when the forces are balanced?

• Due to air resistance

• Due to inertia

• Due to friction

• Due to gravity

What is inertia?

• The acceleration of an object

• The tendency of an object to maintain its state of rest or uniform motion

• The force that opposes motion

• The resistance to air friction

What causes fruits to fall from a tree when it is shaken?

• The net external force becomes zero

• The net external force is disturbed

• The upward force increases

• The downward force decreases

What happens to your body when a car suddenly brakes?

• You feel a backward push

• You move sideways

• You feel a forward jerk

• You remain stationary

Why do you feel a forward push when a car stops suddenly?

• Due to gravity

• Due to inertia

• Due to air resistance

• Due to the car's acceleration

What is another name for Newton's First Law of Motion?

• Law of Acceleration

• Law of Balanced Forces

• Law of Motion

• Law of Gravity