TEST NAME: Physical Science Unit 7 Assessment (SY 20-21) (COPY)
TEST ID: 3769059
GRADE: 09 - Ninth Grade - 11 - Eleventh Grade
SUBJECT: Life and Physical Sciences
TEST CATEGORY: District Benchmark
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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10/20/20, Physical Science Unit 7 Assessment (SY 20-21) (COPY)
Student:
Class:
Date:
1.
This diagram shows a 40-kg object being pulled in one direction while
friction acts on it in the opposite direction.
What is the net force on the object?
2.
A.
160 N
B.
140 N
C.
120 N
D.
20 N
A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock
is taken into outer space, how will its mass and weight be affected?
A.
The weight and mass will remain the same because they are not
altered by the effects of gravity.
B.
The weight will remain the same, but the mass will change because
of the effects of gravity.
C.
The mass will be 76.5 kg, and the weight will increase because of the
effects of gravity.
D.
The mass will be 750 kg, but the weight will decrease because of the
effects of gravity.
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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3.
4.
As the wheels of a train move along the train tracks, what type of friction
exists between the wheels and the tracks?
A.
fluid friction
B.
rolling friction
C.
sliding friction
D.
static friction
A 1,500-kg truck has a net force of 4,200 N acting on it. What is the
truck’s acceleration?
A.
6,300,000 m/s/s
B.
2,700 m/s/s
C. 2.8
m/s/s
D. 0.36
5.
6.
7.
m/s/s
Which sentence correctly describes a friction force?
A.
It acts in the same direction as the motion of an object.
B.
It acts in a direction opposite to the motion of an object.
C.
It acts in a direction perpendicular to the motion of an object.
D.
It acts in the same direction as the force of gravity on an object.
Which of these is an example of sliding friction?
A.
a badminton shuttlecock flying over the net
B.
a basketball rolling across a wooden floor
C.
a flying kite pushed by a gentle breeze
D.
a hockey puck moving across the ice
There is a very slight change in gravity at the top of a mountain. Which property would
MOST likely be less at the top of a mountain?
A.
mass
B.
weight
C.
body density
D.
body temperature
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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8.
9.
10.
11.
12.
13.
The action of swimmers using their arms to propel themselves through the water is an
example of what law?
A.
Newton’s first law of motion
B.
Newton’s third law of motion
C.
law of conservation of linear momentum
D.
law of conservation of angular momentum
If the mass of an object on Earth is 18 grams, what would the mass of the same object be on
the Moon?
A.
0 grams
B.
3 grams
C.
9 grams
D.
18 grams
Which of these causes matter to resist a change in motion?
A.
inertia
B.
friction
C.
gravity
D.
weight
A student pushes a book with a force of 5 N to the east. Which statement describes the
reaction force?
A.
5N eastward, acting on the book
B.
5N westward, acting on the book
C.
5N eastward, acting on the student
D.
5N westward, acting on the student
Which object will have the greatest acceleration if acted upon by a net force of 100 N?
A.
5-kg object
B.
25-kg object
C.
50-kg object
D.
100-kg object
What causes a free falling object to accelerate?
A.
inertia
B.
gravity
C.
initial speed
D.
initial direction
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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14.
A student drops a bowling ball and an apple from a third-story window. Both objects hit the
ground at the same time.
From the experiment the student should conclude that
15.
A.
the apple weighs more than the bowling ball.
B.
the bowling ball speeds up faster than the apple.
C.
more air friction is acting on the apple than on the bowling ball.
D.
gravity pulls on both objects, causing them to fall at the same rate.
When a hammer strikes a nail, the nail
A.
exerts balanced forces that helps it from moving.
B.
exerts a force equal to the weight of the hammer.
C.
exerts an unbalanced force that changes its velocity.
D.
exerts an equal and opposite force back on the hammer.
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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16.
17.
18.
What Force (In Newtons) Is Being Applied To The Van?
A.
100 Newton
B.
10 Newton
C.
40,000 Newton
D.
1000 Newton
Look at the piture below. Which one of Newton's Laws fits this statement: Every action
has and equal and opposite reaction ?
A.
Laww of Proportions
B.
Law if Inertia
C.
Newton's 2nd law
D.
Newton's 3rd Law
What unit do scientists use to measure force?
A.
Newtons
B.
Grams
C.
Meters
D.
Meters per second
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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19.
20.
21.
A spring balance determines that an unknown mass has a weight of 24.5 N. Find the
mass.
A.
2.5 kg
B.
25 kg
C.
.25 kg
D.
0.4 kg
How much does a 125.0 kg object weigh on Earth?
A.
784.0
B.
12.76 N
C.
1113 N
D.
1225 N
Which statement is true about an object in freefall? Assume negligible air resistance.
A.
The object has a constant velocity.
B.
The object has a constant acceleration.
C.
The acceleration of the object increases as it falls.
D.
The velocity decreases as the acceleration decreases as it falls.
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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22.
The picture shows two objects that were dropped and recorded with a stroboscopic
camera. The best explanation for the results is that
A.
has less air resistance.
B.
has a greater mass.
C.
was dropped from a greater height.
D.
accelerated more slowly.
23.
A student holds a book at rest in an outstretched hand. The force exerted on the book by the student
is equal to the book’s
24.
A.
mass.
B.
weight.
C.
volume.
D.
density.
1.
A cart is rolling East across an empty parking lot. It slows down due to friction
between the wheels of the cart and the ground. In what direction does the force of
friction act?
A.
North
B.
South
C.
East
D.
West
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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25.
In a tug of war, one student is pulling with a force of 20 N east. The other student pulls
with a force of 20 N west. What is the net force?
A.
40 N west
B.
40 N east
C.
0N
D.
10 N south
Physical Science Unit 7 Assessment (SY 20-21) (COPY)
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