Q: A box is pulled to the right with a force of $$12 \\ \mathrm{N}$$ and to the left with a force of $$7 \\ \mathrm{N}. $$What is the net force acting on the box?

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

Q: A cart is pushed to the right with a force of $$15 \\ \mathrm{N}$$ while being pulled to the left with a force of $$20 \\ \mathrm{N}. $$What is the net force on the cart?

$$5 \\ \mathrm{N} to $$the left

Q: A $$1 \\ \mathrm{kg}$$ mass weighs $$9.8 \\ \mathrm{N} on $$Earth. What would its mass and weight be on the Moon, where $$g = 1.6 \\ \mathrm{m/s^2$}$$?

Mass: $$1 \\ \mathrm{kg}$$, Weight: $$1.6 \\ \mathrm{N}$$

Question 1

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

Accepted Answer

An object will remain at rest or move at a constant velocity unless acted upon by a nonzero net force.

Question 2

A 2 kg object is resting on the surface of the Moon, where the acceleration due to gravity is $$1.6 \ \mathrm{m/s^2$}. $$What is the weight of the object on the Moon?

Accepted Answer

$$3.2 \ \mathrm{N}$$

Question 3

Galileo used inclined planes in his experiments to:

Accepted Answer

Discover the property called inertia.

Question 4

A box is pulled to the right with a force of $$12 \ \mathrm{N}$$ and to the left with a force of $$7 \ \mathrm{N}. $$What is the net force acting on the box?

Accepted Answer

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

Question 5

Which of the following statements about mass and weight is correct?

Accepted Answer

Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting on that mass.

Question 6

A person stands with one foot on each of two bathroom scales, distributing their weight evenly. If the person weighs $$800 \ \mathrm{N}$$, what does each scale read?

Accepted Answer

$$400 \ \mathrm{N}$$

Question 7

Which of the following is an example of an object in dynamic equilibrium?

Accepted Answer

A hockey puck sliding at constant speed on ice.

Question 8

If you are pushing a crate at a steady speed in a straight line and the friction force is $$60 \ \mathrm{N}$$, how much force must you apply?

Accepted Answer

$$60 \ \mathrm{N}$$

Question 9

Which of the following best describes inertia?

Accepted Answer

The property of matter to resist changes in its motion.

Question 10

A bag of flour is suspended from a spring scale and remains at rest. Which statement is true about the forces acting on the bag?

Accepted Answer

The upward tension force equals the downward weight.

Question 11

A bowling ball is in equilibrium when it:

Accepted Answer

Is at rest or moves steadily in a straight-line path.

Question 12

Which of the following is a vector quantity?

Accepted Answer

Force

Question 13

A cart is pushed to the right with a force of $$15 \ \mathrm{N}$$ while being pulled to the left with a force of $$20 \ \mathrm{N}. $$What is the net force on the cart?

Accepted Answer

$$5 \ \mathrm{N} to $$the left

Question 14

Which equation correctly expresses the equilibrium rule?

Accepted Answer

$$\sum F = 0$$

Question 15

A $$1 \ \mathrm{kg}$$ mass weighs $$9.8 \ \mathrm{N} on $$Earth. What would its mass and weight be on the Moon, where $$g = 1.6 \ \mathrm{m/s^2$}$$?

Accepted Answer

Mass: $$1 \ \mathrm{kg}$$, Weight: $$1.6 \ \mathrm{N}$$

Question 16

You are riding in a van at a steady speed and toss a coin straight up. Where will the coin land?

Accepted Answer

Back in your hand

Question 17

Which of the following is NOT a correct statement about support force (normal force)?

Accepted Answer

It always acts in the same direction as gravity.

Question 18

A crate is at rest on a horizontal floor. Which of the following statements is true?

Accepted Answer

The net force on the crate is zero.

Question 19

If the net force acting on an object is zero, which of the following must be true?

Accepted Answer

The object is either at rest or moving at constant velocity.

Newton’s First Law of Motion—Inertia: Foundations, Concepts, and Applications

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