PHYS 1010 - Exam 1with correct answers

PHYS 1010 - Exam 1with correct |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\




answers
Three fundamental properties - correct answer✔✔Mass
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Length

Time



Mass - correct answer✔✔the amount of matter or "physical substance" which an object or
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group of objects possesses |||\\\ |||\\\ |||\\\




Length - correct answer✔✔the distance between two points in space
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time - correct answer✔✔the period or interval between two events
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Unit of mass - correct answer✔✔the kilogram
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*on the earth, 1 kg has a weight of 9.8 newtons. this is approximately 2.2 lb.
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Unit of length - correct answer✔✔the meter
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*1 m is approximately 3.28 ft
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1 m = 100 cm
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1 km = 1000 m
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unit of time - correct answer✔✔the second
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*60s = 1 min etc |||\\\ |||\\\ |||\\\ |||\\\




Speed - correct answer✔✔the rate at which someone or thing is able to move or operate
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, V=D/t



equation for speed - correct answer✔✔V=D/t |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\




V=speed

D=distance

t=time



velocity - correct answer✔✔the speed of something in a given direction
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3 ways to change velocity - correct answer✔✔1- changing speed
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2- changing the direction
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3- changing the direction AND speed
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acceleration - correct answer✔✔increase in the rate or speed of something; basically how |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\




quickly velocity changes (change in speed, acceleration, direction)
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equation for acceleration - correct answer✔✔a=v/t |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\




a=acceleration

v=velocity

t=time interval |||\\\




Newton's 1st law of motion - correct answer✔✔an object at rest stays at rest and an object in
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motion stays in motion with the same speed and in the same direction unless acted upon by an
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unbalanced force
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Newton's 2nd law of motion - correct answer✔✔the acceleration of an object as produced by
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a net force is directly proportional to the magnitude of the net force, in the same direction as
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the net force, and inversely proportional to the mass of the object
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