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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 opposing forces
B
law of objects at rest
C
law of acceleration
D
law of inertia
2) What does Newton's second law of motion describe?
A
the relationship between force, mass, and acceleration
B
an action causing a reaction
C
an outside force stopping or changing an object's speed or direction
D
inertia
3) An object stays at rest until what happens to it?
A
Gravity overcomes friction.
B
An outside or unbalanced force acts upon the object.
C
Inertia releases it.
D
Friction builds up and moves the object.
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 * velocity
B
Force= acceleration/mass
C
Force= mass * acceleration
D
Force= mass/acceleration
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
100 N
B
98 N
C
10 N
D
9.8 N
7) How much force is needed to accelerate a 2000-kg car at 5 meters per second?
A
1000 N
B
400 N
C
10000 N
D
500 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
Gravity
C
Friction
D
Thrust
10) In magnetism, which pole of a magnet will repel a south pole?
A
A south pole.
B
Both a north and a south pole.
C
Neither a north nor a south pole.
D
A north pole.
11) Which object would require the greatest amount of force to move one meter?
A
500 mg of aspirin
B
2 kg of cement
C
25 g of toilet paper
D
25 kg of ice
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 speed up
D
The object will stop.
13) What reduces the effects of friction?
A
lubrication
B
gravity
C
rocks
D
wind
14) What material should be used on a bicycle ramp to increase friction?
A
carpet
B
ice
C
glass
D
wood
15) If a force is applied in the SAME direction an object is moving, the object will __________.
A
Stop
B
Remain the same speed
C
Speed up
D
Slow down
16) What is the name of the force that is caused by two surfaces rubbing together to produce heat?
A
magnetism
B
force
C
gravity
D
friction
17) Which force is needed to help stop a child from slipping on ice?
A
force
B
magnetism
C
gravity
D
friction
18) Which of the following contains two non-contact forces?
A
Gravity and friction
B
Friction and magnetism
C
Force and friction
D
Gravity and magnetism
19) What is the most reasonable explanation for why a toy car travels further on a wood floor than on thick carpet.
A
The surface allow the car to travel equal distance.
B
The carpet has more friction to slow down the car.
C
The surfaces are made of the same texture.
D
The wood floor has more friction to speed up the car.
20) Which of the following materials is magnetic?
A
metal
B
silver
C
iron
D
wood
*select an answer for all questions
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