Question 1

According to Aristotle, which of the following best describes 'natural motion'?

Accepted Answer

Motion of every object that 'strives' to get back to its proper place based on its nature.

Question 2

Galileo's inclined plane experiments led to which important concept in physics?

Accepted Answer

The concept of inertia, where objects resist changes in their state of motion.

Question 3

Which of the following statements best summarizes Newton's First Law of Motion?

Accepted Answer

Every object continues in a state of rest or of uniform speed in a straight line unless acted on by a net external force.

Question 4

A book rests on a table. Which of the following best describes the forces acting on the book?

Accepted Answer

There is a downward force of gravity and an upward support (normal) force from the table, which are equal in magnitude.

Question 5

Which equation represents the condition for mechanical equilibrium?

Accepted Answer

$$\sum F = 0$$

Question 6

A car is moving at a constant velocity in a straight line. According to Newton's First Law, what can you conclude about the net force acting on the car?

Accepted Answer

The net force is zero.

Question 7

Which of the following is an example of a long-range force?

Accepted Answer

Gravity acting on a falling apple.

Question 8

A box is being pushed across a floor at constant speed. Which statement is correct about the forces acting on the box?

Accepted Answer

The applied force is equal to the friction force.

Question 9

Which of the following best describes inertia?

Accepted Answer

The property of matter to resist a change in its state of motion.

Question 10

A person stands on a scale in an elevator that is at rest. Which of the following is true about the forces acting on the person?

Accepted Answer

The upward normal force from the scale is equal to the downward gravitational force.

Question 11

Which of the following scenarios is an example of dynamic equilibrium?

Accepted Answer

A person walking at a constant speed in a straight line.

Question 12

If two forces of 10 N and 15 N act in opposite directions on an object, what is the magnitude of the net force?

Accepted Answer

$$5\ 	ext{N}$$

Question 13

Which of the following best describes a vector quantity?

Accepted Answer

A quantity that has both magnitude and direction.

Question 14

A student pushes a box with a force of 20 N to the right, while friction exerts a force of 15 N to the left. What is the net force acting on the box?

Accepted Answer

$$5\ 	ext{N}$$\ to\ the\ right

Question 15

Which of the following is NOT a contact force?

Accepted Answer

Gravity

Question 16

A block is at rest on a horizontal surface. Which statement is true about the forces acting on the block?

Accepted Answer

The normal force is equal in magnitude and opposite in direction to the gravitational force.

Question 17

If a net force acts on an object, what will happen to the object's motion?

Accepted Answer

It will accelerate in the direction of the net force.

Question 18

Which of the following best explains why dishes remain on a tablecloth when the cloth is quickly pulled out from under them?

Accepted Answer

The inertia of the dishes resists the change in motion.

Question 19

A skydiver jumps from a plane and reaches terminal velocity. Which statement is true about the forces acting on the skydiver?

Accepted Answer

The force of gravity is equal to the air resistance.

Question 20

When adding two perpendicular vectors of magnitudes 3 units and 4 units, what is the magnitude of the resultant vector?

Accepted Answer

$$5$$

Newton's First Law of Motion – Inertia: Structured Study Notes

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