Question 1

Galileo's famous experiment at the Leaning Tower of Pisa (as depicted in the image) demonstrated which of the following principles?

Accepted Answer

Objects of different weights fall at the same rate in the absence of air resistance.

Question 2

A ball rolls down an inclined plane and its speed increases. According to Galileo's concept of inertia, what will happen to the ball if it rolls on a perfectly horizontal surface with no friction (as shown in the image)?

Accepted Answer

Its speed will remain constant.

Question 3

Two forces, $$5\ \mathrm{N}$$ and $$5\ \mathrm{N}$$, act on a box in the same direction. What is the net force acting on the box?

Accepted Answer

$$10\ \mathrm{N}$$

Question 4

A box is pulled to the left with a force of $$5\ \mathrm{N}$$ and to the right with a force of $$10\ \mathrm{N}. $$What is the net force acting on the box?

Accepted Answer

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

Question 5

Which of the following is a vector quantity?

Accepted Answer

Force

Question 6

Given two vectors at right angles, one of $$30\ \mathrm{N}$$ and one of $$40\ \mathrm{N}$$, what is the magnitude of their resultant?

Accepted Answer

$$50\ \mathrm{N}$$

Question 7

Nellie Newton hangs from a rope with two sides at different angles. Which side of the rope has the greater tension?

Accepted Answer

The side with the smaller angle to the vertical

Question 8

A bag of flour hangs at rest from a string. Which statement best describes the forces acting on the bag?

Accepted Answer

The upward tension force is equal in magnitude and opposite in direction to the downward gravitational force.

Question 9

The equilibrium rule $$\sum \vec{F} = 0$$ applies to which type of quantities?

Accepted Answer

Vector quantities

Question 10

When you stand with one foot on each of two bathroom scales and your weight is evenly distributed, what does each scale read?

Accepted Answer

Half your weight

Question 11

A hockey puck slides at constant speed on frictionless ice. Which statement is true?

Accepted Answer

The puck is in dynamic equilibrium.

Question 12

You push a crate at a steady speed in a straight line. If the friction force is $$75\ \mathrm{N}$$, how much force must you apply?

Accepted Answer

Equal to $$75\ \mathrm{N}$$

Question 13

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

Accepted Answer

In your hand

Question 14

Which of the following best describes inertia?

Accepted Answer

A property of matter to resist changes in motion

Question 15

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

Accepted Answer

The net force on the crate is zero.

Question 16

Which of the following is NOT a vector quantity?

Accepted Answer

Mass

Question 17

A book rests on a table. What is the support force acting on the book?

Accepted Answer

Equal to the weight of the book and directed upward

Question 18

If two forces of $$8\ \mathrm{N}$$ and $$6\ \mathrm{N}$$ act at right angles to each other, what is the magnitude of the resultant force?

Accepted Answer

$$10\ \mathrm{N}$$

Question 19

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

Accepted Answer

A car continues moving at constant speed on a straight road until the driver applies the brakes.

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

Guida di studio - Domande di pratica

Study guide - Flashcard