Forces and Motion Quiz True or False
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1.
If car A's top acceleration takes it from 0 mph to 60 mph in 10 seconds, and car B's top acceleration takes it from 0 mph to 60 mph in 5 seconds, which car has the more forceful engine? -> Car B
True
False
2.
What can be said about an object in equilibrium? -> The object is moving at constant velocity.
True
False
3.
We’re standing in an elevator. The elevator begins to go up. How does our weight change? -> Our weight increases as the elevator goes up, but will decrease when it goes down.
True
False
4.
A car that accelerates from 0 to 60 mph in 8 seconds is driving along a highway at a speed of 60 mph when the driver notices a traffic jam ahead. He has only 4 seconds to bring the car to a complete stop or the traffic jam becomes a pile up. How much force do the breaks need to apply to the wheels relative to the amount of force required to get the car moving at 60 mph in the first place? -> None of the above.
True
False
5.
How is it possible for an object to be in equilibrium with friction acting on it? -> It’s not possible.
True
False
6.
The Moon orbits the Earth because: -> The Moon follows a path in spacetime warped by Earth.
True
False
7.
Two bodies of mass
m
1
and
m
2
orbit a body of mass
M
at a distance
r
. Which of the following statements is true? -> Both
m
1
and
m
2
have the same orbital speed.
True
False
8.
If the mass of the Sun suddenly increased, what would happen to the planets in orbit? -> The planets would be expelled from the Solar System.
True
False
9.
If the mass of the Sun suddenly decreased, but the planets’ orbits stayed the same, what else would need to change about the current configuration of this new Solar System? -> The planets’ orbital speeds would need to increase.
True
False
10.
A roller coaster ride’s physics is best described by: -> Centripetal and gravitational forces and accompanying accelerations.
True
False
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