Question 1

Which of the following best describes a force?

Accepted Answer

A force is a push or pull that acts on an object and can cause a change in the object's motion.

Question 2

A soccer ball is at rest on the field. According to Newton's First Law, what will happen to the ball if no net force acts on it?

Accepted Answer

The ball will remain at rest.

Question 3

Which equation correctly relates weight ($$W$$), mass ($$m$$), and gravitational acceleration ($$g$$)?

Accepted Answer

$$W = m 	imes g$$

Question 4

If an object has a mass of $$5\ \mathrm{kg}$$, what is its weight on Earth? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$49\ \mathrm{N}$$

Question 5

A book is sliding across a table and eventually comes to a stop. Which force is primarily responsible for stopping the book?

Accepted Answer

Friction

Question 6

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

Accepted Answer

An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by a net force.

Question 7

A person pushes a box across the floor with a constant velocity. What can be said about the forces acting on the box?

Accepted Answer

The applied force is equal to the frictional force.

Question 8

Which of the following is NOT a type of force mentioned in the study materials?

Accepted Answer

Magnetism

Question 9

A $$10\ \mathrm{kg}$$ object is on the Moon, where $$g = 1.6\ \mathrm{m/s^2$}. $$What is its weight on the Moon?

Accepted Answer

$$16\ \mathrm{N}$$

Question 10

Which scenario best demonstrates the effect of friction?

Accepted Answer

A car slowing down as it comes to a stop at a red light.

Question 11

If a net force of $$20\ \mathrm{N} is $$applied to a $$4\ \mathrm{kg}$$ object, what is its acceleration?

Accepted Answer

$$5\ \mathrm{m/s^2$}$$

Question 12

Which of the following is the correct SI unit for force?

Accepted Answer

N

Question 13

A $$2\ \mathrm{kg}$$ object is at rest. What is the net force acting on it?

Accepted Answer

$$0\ \mathrm{N}$$

Question 14

Which of the following best explains why a moving car eventually comes to a stop if the engine is turned off?

Accepted Answer

Friction and air resistance act as unbalanced forces.

Question 15

A $$3\ \mathrm{kg}$$ object is moving at a constant velocity. What can be said about the net force acting on it?

Accepted Answer

The net force is zero.

Question 16

Which of the following is a direct consequence of Newton's First Law?

Accepted Answer

Objects resist changes in their state of motion.

Question 17

A $$6\ \mathrm{kg}$$ box is pulled with a force of $$18\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

$$3\ \mathrm{m/s^2$}$$

Question 18

Which of the following is true about mass and weight?

Accepted Answer

Weight depends on gravitational acceleration, but mass does not.

Question 19

A $$7\ \mathrm{kg}$$ object is dropped from rest. What is the force of gravity acting on it on Earth?

Accepted Answer

$$68.6\ \mathrm{N}$$

Question 20

Which of the following best describes inertia?

Accepted Answer

The tendency of an object to resist changes in its motion.

Forces, Newton's First Law, Mass and Weight

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