Physics Midterm Review 2 Question Preview (ID: 45125)


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What causes a moving object to change direction?
a) Acceleration
b) Velocity
c) Inertia
d) Force

According to the scientific method, how does a physicist formulate and objectively test hypotheses?
a) by defending an opinion
b) by interpreting graphs
c) by experiments
d) by stating conclusions

When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
a) The car slows down
b) The car speeds up
c) The car travels at constant speed
d) The car remains at rest

In whihc of the following scenarios is work done?
a) A weightlifter holds a barbell overhead for 2.5 s.
b) A construciton worker carries a heavy beam while walking at constant speed along a flat surface
c) A car decelerates while traveling on a flat stretch of road
d) A student holds a spring in a compressed position

The symbol mm represents a
a) micrometer
b) millimeter
c) megameter
d) manometer

Which of the following statements does not describe force?
a) Force causes objects at rest to remain stationary
b) Force causes objects to start moving
c) Force causes objets to stop moving
d) Force causes objects to change direction

Which of the following is an example of a vector quantity?
a) Velocity
b) Temperature
c) Volume
d) Mass

Which way does gravity always pull?
a) Depends on the surface
b) Straight down
c)
d)

Which of the following is not an example of projectile motion?
a) volleyball served over the net
b) baseball hit by a bat
c) hot air balloon drifting toward Earth
d) long jumer in action

A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter's acceleration?
a) 0.22 m/s/s
b) 0.69 m/s/s
c) 3.2 m/s/s
d) 4.6 m/s/s

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