Chapter 2

Question 1

Natural motion Def; by who

Answer 1

Everything has a proper place based off the 4 elements. Everything strives to be in it’s natural place.
Aristotle

Question 2

Natural motion direction

Answer 2

Moves up and down on earth; circular in space

Question 3

Violent motion Def

Answer 3

Produced by external pushes or pulls on objects

Question 4

Galileo’s discovery (2)

Answer 4

Objects dropped from the same height hit the ground at the same time.
A moving object needs no force to keep it moving in the absence of friction.

Question 5

Force Def

Answer 5

A push or pull

Question 6

Inertia Def (2)

Answer 6

• is a property of matter to resist changes in
  motion.
• depends on the amount of matter in an object
  (its mass).

Question 7

If the ball comes to rest, it is due to

Answer 7

Friction

Question 8

The use of inclined planes for Galileo’s experiments helped him to
A. eliminate the acceleration of free fall.
B. discover the concept of energy.
C. discover the property called inertia.
D. discover the concept of momentum

Answer 8

C. discover the property called inertia.

Question 9

Newton’s First Law of Motion

Answer 9

An object will maintain it’s state of inertia (moving or still) unless an outside force acts upon the object.

Question 10

Vector quantity Def

Answer 10

arrows drawn to scale that show magnitude (how much) and direction (which way)

Question 11

Scalar quantity Def

Answer 11

has magnitude

Question 12

Net force Def

Answer 12

combination of all forces that act on an object

Question 13

A cart is pulled to the right with a force of 15 N
while being pulled to the left with a force of 20 N.
The net force on the cart is
A.5 N to the left.
B.5 N to the right.
C.25 N to the left.
D.25 N to the right.

Answer 13

A.5 N to the left.

Question 14

What is the net force acting on the box?
5N<–[]—>10N
A.15 N to the left
B.15 N to the right
C.5 N to the left
D.5 N to the right

Answer 14

D.5 N to the right

Question 15

Resultant Def

Answer 15

The sum of two or more vectors.

Question 16

Referring to the figure, which of the following are true
statements?
30N 50N
| /
[] —>40N
A.50 N is the resultant of the 30- and the 40-N vectors.
B. The 30-N vector can be considered a component of the 50-N vector.
C. The 40-N vector can be considered a component of the 50-N vector.
D. All of the above are correct.

Answer 16

D. All of the above are correct.

Question 17

The Equilibrium Rule

Answer 17

The vector sum of forces acting on a nonaccelerating
object equals zero

Question 18

The equilibrium rule applies to
A. vector quantities.
B. scalar quantities.
C. Both of the above.
D. None of the above

Answer 18

A. vector quantities.

Question 19

Support force Def

Answer 19

(normal force) an upward force on an object that is opposite to the force of gravity ( a Spring)

Question 20

When you stand on two bathroom scales with one foot on each
scale and with your weight evenly distributed, each scale will
read
A. your weight.
B. half your weight.
C. zero.
D. more than your weight

Answer 20

B. half your weight

Question 21

Equilibrium Def

Answer 21

state of no change with no net force acting

Question 22

Static Equilibrium Def

Answer 22

An object at rest

Question 23

Dynamic Equilibrium Def

Answer 23

An object in constant motion

Question 24

Equilibrium test

Answer 24

whether something undergoes change in motion

Question 25

A bowling ball is in equilibrium when it A.is at rest. B. moves steadily in a straight-line path. C. Both of the above. D. None of the above.

Answer 25

C. Both of the above

Question 26

You push a crate at a steady speed in a straight line. If the friction force is 75 N, how much force must you apply? A. More than 75 N. B. Less than 75 N. C. Equal to 75 N. D. Not enough information

Answer 26

C. Equal to 75 N

Question 27

You are riding in a vehicle at a steady speed and toss a coin straight upward. Where will the coin land? A. Behind you. B. Ahead of you. C. In your hand. D. There is not enough information

Answer 27

C. In your hand