AnswersTPS-202526-SCI-Physical Science 1B-CRUnit Test

Unit Test — Unit test Answers

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1
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Newton’s first law of motion was a giant leap forward in scientific thought during Newton’s time. Even today, the idea is sometimes difficult at first for people to understand.

A
A rolling ball eventually slows down and comes to a stop.
B
A wagon must be pushed before it begins to move.
C
The heavier the load in a cart, the harder the cart is to turn.
D
A box does not move when pushed equally from opposite sides.
2
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The resulting net force of an object is represented below. →10 NWhich most likely represent the forces acting on the object?

A
↑ 63 N and ↓ 73 N
B
↑ 97 N and ↓ 87 N
C
← 63 N and → 73 N
D
← 97 N and → 87 N
3

A skydiver falls toward the ground at a constant velocity. Which statement best applies Newton’s laws of motion to explain the skydiver’s motion?

A
An upward force balances the downward force of gravity on the skydiver.
B
The skydiver’s inertia is zero, which no longer allows for acceleration.
C
An unbalanced force pulls the skydiver toward the ground.
D
The mass of the skydiver is so great that there is no acceleration.
4

Which refers to the force that one massive object exerts to attract another object?

A
velocity
B
gravity
C
acceleration
D
newton
5

Which refers to the sum of all the forces that act upon an object?

A
absolute force
B
net force
C
positive force
D
balanced force
6

The chart lists the masses and velocities of four objects.

Question illustration
A
W
B
X
C
Y
D
Z
7

Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after the objects collide and bounce apart?

A
velocity
B
mass
C
momentum
D
direction
8

Which statement correctly describes gravity?

A
an attractive force that acts between all objects through contact
B
an attractive force that acts between all objects without contact
C
a repulsive force that acts between all objects through contact
D
a repulsive force that acts between all objects without contact
9

When discussing Newton’s laws of motion, which terms do people most likely use when talking about Newton’s third law of motion?

A
“force” and “acceleration”
B
“inertia” and “force”
C
“action” and “reaction”
D
“mass” and “inertia”
10

Which example best represents balanced forces?

A
an elevator stopped on the third floor
B
a basketball shot into a hoop
C
a sled sliding down a snowy hill
D
a tow truck pulling a car out of a ditch
11

Which change will cause the gravitational force between a baseball and a soccer ball to increase?

A
removing the outer layer of the baseball
B
moving the balls farther apart
C
wrapping the soccer ball in layers of duct tape
D
using a baseball with a thinner leather
12

A bicycle has a momentum of 36 kg • m/s and a velocity of 4 m/s. What is the mass of the bicycle?

A
9 kg
B
32 kg
C
40 kg
D
144 kg
13

An object in projectile motion will follow which path?

A
curved up from the ground
B
curved down toward the ground
C
straight down toward the ground
D
straight up from the ground
14

Anya knows the velocity of an object. What else does she need to know in order to find the object’s momentum?

A
its mass
B
its height
C
its density
D
its speed
15

Which would be represented by FN on a force diagram?

A
Northern Force
B
Newton Force
C
Normal Force
D
Negative Force
16

An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s2? (Formula: F=ma)

A
0.83 N
B
1.2 N
C
11 N
D
30 N
17

An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force?

A
The net force is positive.
B
The net force is zero.
C
The positive force is greater than the negative force.
D
The negative force is greater than the positive force.
18

Which change will always result in an increase in the gravitational force between two objects?

A
increasing the masses of the objects and increasing the distance between the objects
B
decreasing the masses of the objects and decreasing the distance between the objects
C
increasing the masses of the objects and decreasing the distance between the objects
D
decreasing the masses of the objects and increasing the distance between the objects
19

Polly is pushing a box to the right across the floor with a force of 30 N. The force of gravity is 8 N, and the normal force is 8 N. Which value could describe the force of friction if Polly could not move the box?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
20

The diagram shows two balls before they collide.

Question illustration
A
0.0 kg • m/s
B
0.2 kg • m/s
C
0.3 kg • m/s
D
0.4 kg • m/s

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