Forces and Motion Quiz True or False

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
2. What can be said about an object in equilibrium? -> The object is moving at constant velocity.
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.
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.
5. How is it possible for an object to be in equilibrium with friction acting on it? -> It’s not possible.
6. The Moon orbits the Earth because: -> The Moon follows a path in spacetime warped by Earth.
7. Two bodies of mass m1 and m2 orbit a body of mass M at a distance r. Which of the following statements is true? -> Both m1 and m2 have the same orbital speed.
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.
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.
10. A roller coaster ride’s physics is best described by: -> Centripetal and gravitational forces and accompanying accelerations.

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