Transcript Physical Science Review

Forces and Motion
Velocity and
Acceleration
Balanced and
Unbalanced
Forces
Newton’s
Laws
Simple
Machines
Miscellaneous
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Which of the following is an
example of changing
acceleration?
A. A train traveling 65 miles per hour south
B. A boat sailing west at 5 knots
C. A person jogging at 3 meters/second along a
winding path
D. A car stopped at a red light
Answer
100 points
C. A person jogging at 3 meters
per second along a winding
path
Home
Which of the following is NOT
needed to determine the velocity of
a moving truck?
A.
B.
C.
D.
The mass of the truck
The distance it travels
The time it takes to travel that distance
The direction in which it is traveling
Answer
200 points
A. Mass of the truck
Home
An object accelerates if its
A.
B.
C.
D.
Speed remains constant
Direction changes
Mass remains constant
Motion can be plotted on a graph
Answer
300 points
B. Direction Changes
Home
What is the average speed of
an object that travels 100
meters in 20 seconds?
A. 4 m/s
B. 8 m/s
C. 5 m/s
D. 10 m/s
Answer
400 points
C. 5 m/s
Home
A car started out going 50 m/s and
accelerated to 75 m/s in a matter of 25
seconds. What is the car’s acceleration?
A.
B.
C.
D.
2 m/s2
3 m/s2
4 m/s2
1 m/s2
Answer
500 points
D. 1 m/s2
Home
What happens to an object if the
forces acting upon it are balanced?
A.
B.
C.
D.
Its motion will not change
The object will come to a stop
The net force will be zero
Its motion will change
Answer
100 points
A. Motion does not change
Home
What happens to an object
moving in the same direction as
the net force?
A.
B.
C.
D.
It will speed up
Its motion will not change
It will stop moving
It will slow down
Answer
200 points
A. It will speed up
Home
What happens to an object if the forces
acting upon it are unbalanced?
A.
B.
C.
D.
Its motion will not change
The object will come to a stop
The net force will be zero
Its motion will change
Answer
300 points
D. Its motion will change
Home
Which pair of objects will have
the least gravitational attraction
to each other?
A.
B.
C.
D.
Two cinder blocks 6 cm apart
Two marbles 12 cm apart
A cinder block and marble 6 cm apart
A cinder block and marble 12 cm apart
Answer
400 points
B. Two marbles 12 cm apart
Home
Which walking surface has the
least friction?
A.
B.
C.
D.
Sand
Ice
Wood floor
Carpet
Answer
500 points
B. ice
Home
This term is used to describe an object’s
tendency to resist a change in motion. It also
explains why we wear seatbelts.
A.
B.
C.
D.
Friction
Gravity
Inertia
Balanced Force
Answer
100 points
C. Inertia
Home
Which of Newton’s Laws explains the
concept of inertia? (An object in motion
remains in motion)
A.
B.
C.
D.
1st Law
2nd Law
3rd Law
4th Law
Answer
200 points
A. Newton’s
st
1
Law
Home
Which of Newton’s Laws explains the
relationship between force, mass, and
acceleration?
A.
B.
C.
D.
Newton’s 1st Law
Newton’s 2nd Law
Newton’s 3rd Law
Newton’s 4th Law
Answer
300 points
B. Newton’s
nd
2
Law
Home
Which of Newton’s Laws is also known
as The Law of Conservation of
Momentum?
A.
B.
C.
D.
Newton’s 1st Law
Newton’s 2nd Law
Newton’s 3rd Law
Newton’s 4th Law
Answer
400 points
rd
3
C. Newton’s
Law of
Motion
Home
Which of the following forces is
responsible for holding water in a
bucket when it is swung over
someone’s head?
A.
B.
C.
D.
Gravity
Friction
Centripetal Force
Motion
Answer
500 points
C. Centripetal Force
Home
What does a machine do?
A. Makes work easier
B. Increases both the force and distance
involved in work
C. Increases the amount of work done
D. Decreases the amount of work done
Answer
100 points
A. Makes work easier
Home
What is the pivot point of a lever
called?
A.
B.
C.
D.
Load
Effort
Fulcrum
Wedge
Answer
200 points
C. Fulcrum
Home
Which simple tool includes an
inclined plane?
A.
B.
C.
D.
Wheel and axle
Pulley
Lever
Screw
Answer
300 points
D. Screw
Home
Which simple machine is used
in a doorknob?
A.
B.
C.
D.
Pulley
Wheel and axle
Screw
Lever
Answer
400 points
B. Wheel and axle
Home
Which simple machine would work best if
you were trying to lift a load AND move it
horizontally?
A.
B.
C.
D.
Wheel barrow
Inclined plane
Pulley
Lever
Answer
500 points
B. Inclined plane
Home
Which object has the greatest inertia?
A.
B.
C.
D.
A 3 gram ping pong ball
A 5 gram marble
A 1 kg rubber ball
A 10 kg bowling ball
Answer
100 points
D. A 10 kg bowling ball
Home
Which two simple machines are used in a
wheel barrow?
A.
B.
C.
D.
Inclined plane and wedge
Pulley and screw
Wheel and axle and lever
Wheel and axle and pulley
Answer
200 points
C. Wheel and axle and lever
Home
Which example does NOT involve work
being done?
A. A waiter pushes a food cart across a
dining room
B. A rocket accelerates into space
C. A person places a heavy box up on a
high shelf
D. A ball is rolled up a hill
Answer
300 points
B. A rocket accelerates into
space
Home
Sandra rides a train a distance of 150
kilometers. The entire trip takes a total
of 3 hours. What is the average speed
of the train?
A.
B.
C.
D.
450 km/h
150 km/h
75 km/h
50 km/h
Answer
400 points
D. 50 km/h
Home
How does a simple machine make
work easier?
A. It allows you to use less force
B. It increases the amount of work that is done
C. It allows force to be applied over a greater
distance so that less force is needed for the
same amount of work
D. You do the work on the machine, and the
machine does the work on you.
Answer
500 points
C. It allows force to be applied
over a greater distance so that
less force is needed for the
same amount of work
Home