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Unit 2 - Forces
Test Description: Unit review about forces
Instructions: Answer all questions to get your test result.
1) If no force acts on a moving object, _____________
A
it will slow down
B
it will keep moving in the same direction
C
It will stop
D
it will change direction
2) What does Newton's third law of motion state?
A
For every action there is an equal and opposite reaction
B
An object in motion will remain in motion unless acted upon by another object.
C
Force equals mass time acceleration
D
If you push something hard enough, it will fall over.
3) Mr. Swank is in a stationary boat on the lake. He is reeling in a fish at 2 ft per sec. The fish is swimming away at 1.5 ft per sec. The speed at which the fish moves toward Mr. Swank is:
A
2.5 feet per second
B
.5 foot per second
C
2 feet per second
D
1.5 feet per second
4) Which statement is true about magnetic poles?
A
like poles attract
B
opposite poles attract
C
opposite poles repel
D
like poles artn't possible
5) The gravitational attraction between two objects depends on the distance between the objects and their:
A
masses
B
volumes
C
magnetic attraction
D
momentum
6) The speed and direction of an object's motion is its _____________
A
velosity
B
momentum
C
inertia
D
mass
7) When two magnets are brought close to each other, they repel each other. What can be concluded about these magnets?
A
EITHER TWO NORTH POLES OR TWO SOUTH POLES WERE BROUGHT TOGETHER.
B
The magnets have been demagnetized
C
A north pole and a south pole were brought together
D
the magnets were wet
8) The overall force acting on an object after all forces are combined is called the:
A
air force
B
unbalanced force
C
balanced force
D
net force
9) According to Newton's second law of motion, what two factors does the acceleration of an object depend?
A
the speed and direction that the object is moving
B
the mass and weight of the object
C
the mass of the object and the amount of force applied to it
D
the velocity of the object and the amount of force applied to it
10) Which equation below represents Newton's second law of motion?
A
W = F X D
B
d = m/v
C
F = m X a
D
F = m/a
11) if a force of 10 newtons acts on an object and an additional force of 6 newtons acts in the SAME direction, what will be the net force on the object?
A
60 newtons
B
6 newtons
C
4 newtons
D
16 newtons
12) The force that prevents a ball rolling on the ground from continuing on its path forever is:
A
inertia
B
kinetic energy
C
momentum
D
friction
13) friction is a ________________.
A
form of matter
B
form of gravity
C
force
D
form of energy
14) Which statement below about gravitational attraction is true?
A
Gravitational attraction is unaffected by mass or distance between objects
B
Gravitational attraction increases as the mass of the objects decreases
C
Gravitational attraction decreases as distance between objects increases
D
Bravitational attraction increases as distance beteen objects increases
15) Mrs. Kensill places two bar magnets on a table. She slowly slides one magnet closer to the second. Eventually, the second magnet begins to move away from the first. What can she conclude about the repulsive force between the magnets?
A
The force increases with decreasing distance between the magnets.
B
The force increases with increasing distance between the magnets
C
There is no force between the magnets.
D
The force is unaffected by the distance between the magnets.
16) Newton's first law states that an object must travel at a constant speed and in _______________, unless some outside force compels it to change.
A
a cyclic motion
B
a curved path
C
a straight line
D
a wave-like manner
17) A change in position of an object is its:
A
acceleration
B
speed
C
momentum
D
motion
18) What will happen if you drop a golf ball, a baseball, and a bowling ball at the same instant from the top of a tall building?
A
the bowing ball will hit the ground first
B
the golf ball will hit the ground first
C
The baseball will hit the ground first
D
all three balls will hit the ground at the same time.
*select an answer for all questions
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