Unit 3 Forces

Quiz by Kate Downey

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31 questions
• Q1
What causes some objects to fall slower than others?
forces
air resistance
gravity
acceleration
30s
• Q2
When a falling object reaches terminal velocity, the force of gravity __________ the force of air resistance.
is unrelated to
is less than
equals
is greater than
30s
• Q3
In which direction is centripetal force?
toward the center of a circle
along the curve
upward
toward the edges of a circle
30s
• Q4
What happens to the weight of astronauts when they are in orbit?
it increases
it does not change
it becomes zero
it decreases but does not become zero
30s
• Q5
__________ measures an object's tendency to resist changing its motion.
mass
weight
inertia
gravity
30s
• Q6
Newton's first law of motion states that __________.
when a force is applied on an object, there is an equal force applied by the object in the opposite direction
when a force acts on an object, its acceleration is in the same direction as the force
an object will remain at rest or keep moving unless a force acts on it
acceleration is calculated by dividing the force exerted on an object by the mass of the object
30s
• Q7
When force is increased, what happens to acceleration?
It fluctuates.
It increases.
It stays the same.
It decreases.
30s
• Q8
Newton's second law of motion is __________.
F = m xa

F= m/a

p = m/v
p = m × v
30s
• Q9
Newton's third law of motion states that __________.
an object at rest tends to stay at rest
for every action force there is an equal and opposite reaction force
an object in motion tends to stay in motion
force is equal to mass times acceleration
30s
• Q10
A(n) __________ is a push or a pull that one body exerts on another.
velocity
force
acceleration
motion
30s
• Q11
The __________ is the combination of all the forces acting on an object.
inertia
force pair
net force
direction of motion
30s
• Q12
Forces that cancel each other are called __________ forces.
unbalanced
neutral
inactivated
balanced
30s
• Q13
Which best demonstrates friction?
a car rolling to a stop at a traffic light
an ice-skater sliding across the ice without noticeably slowing down
the free fall of astronauts in orbit
a baseball moving in a projectile motion
30s
• Q14
A snow skier slowing to a stop after skiing down a mountain demonstrates __________ friction.
sliding
air
rolling
static
30s
• Q15
The gravitational force exerted on an object is called the object’s ______.
acceleration
velocity
weight
mass
30s

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