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Friction, Gravity, And Magnetism
Test Description: Friction, gravity, and magnetism
Instructions: Answer all questions to get your test result.
1) What is the name of Newton's first law of motion?
A
law of objects at rest
B
law of acceleration
C
law of inertia
D
law of opposing forces
2) What does Newton's second law of motion describe?
A
inertia
B
the relationship between force, mass, and acceleration
C
an action causing a reaction
D
an outside force stopping or changing an object's speed or direction
3) An object stays at rest until what happens to it?
A
Friction builds up and moves the object.
B
Gravity overcomes friction.
C
An outside or unbalanced force acts upon the object.
D
Inertia releases it.
4) What is acceleration?
A
change in pressure/change in time
B
change in distance/change in time
C
change in mass/change in volume
D
change in velocity/change in time
5) What is the formula for force?
A
Force= mass * acceleration
B
Force= acceleration/mass
C
Force= mass/acceleration
D
Force= mass * velocity
6) A 10 kg falling object accelerates downward at 9.8 meters per second per second. What is the force acting on the object.
A
10 N
B
98 N
C
100 N
D
9.8 N
7) How much force is needed to accelerate a 2000-kg car at 5 meters per second?
A
10000 N
B
400 N
C
500 N
D
1000 N
8) When no friction is involved, what can an outside force do to a moving object?
A
nothing.
B
change the object's speed or direction.
C
change the object's speed only.
D
change the object's direction only.
9) Which force tries to pull all things toward the core?
A
Magnetism
B
Thrust
C
Gravity
D
Friction
10) In magnetism, which pole of a magnet will repel a south pole?
A
Both a north and a south pole.
B
A north pole.
C
A south pole.
D
Neither a north nor a south pole.
11) Which object would require the greatest amount of force to move one meter?
A
25 kg of ice
B
2 kg of cement
C
25 g of toilet paper
D
500 mg of aspirin
12) If a force is applied to the side of a MOVING object, the object will ____________.
A
The object will turn
B
The object will drop
C
The object will stop.
D
The object will speed up
13) What reduces the effects of friction?
A
rocks
B
wind
C
gravity
D
lubrication
14) What material should be used on a bicycle ramp to increase friction?
A
wood
B
carpet
C
ice
D
glass
15) If a force is applied in the SAME direction an object is moving, the object will __________.
A
Slow down
B
Speed up
C
Remain the same speed
D
Stop
16) What is the name of the force that is caused by two surfaces rubbing together to produce heat?
A
force
B
magnetism
C
friction
D
gravity
17) Which force is needed to help stop a child from slipping on ice?
A
magnetism
B
gravity
C
friction
D
force
18) Which of the following contains two non-contact forces?
A
Friction and magnetism
B
Gravity and magnetism
C
Force and friction
D
Gravity and friction
19) What is the most reasonable explanation for why a toy car travels further on a wood floor than on thick carpet.
A
The wood floor has more friction to speed up the car.
B
The surfaces are made of the same texture.
C
The carpet has more friction to slow down the car.
D
The surface allow the car to travel equal distance.
20) Which of the following materials is magnetic?
A
iron
B
silver
C
metal
D
wood
*select an answer for all questions
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