Physics test 1
g always equals acceleration, what is this amount?
10 m/s
suppose an object is at free fall. each second the object falls:
a larger distance than in the second before.
if you drop a feather and a coin at the same time in a tube filled with air, which will reach the bottom of the tube first?
the coin.
acceleration
the rate at which velocity is changing
a ball is thrown upwards and caught when it comes down. in the absence of air resistance, the speed of the ball when caught would be:
the same as the speed it had when thrown upwards.
as an object falls freely in a vacuum,:
its velocity increases.
one possible unit of speed is:
miles per hour.
in the absence of air resistance:
objects fall at a constant acceleration
if you were to take the distance of a distance vs. time graph, what quantity would you be calculating?
speed.
if a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by:
about 10 m/s.
when you look at the speedometer in a moving car, you can see the car's:
instantaneous speed
suppose you are in a car going around a curve. the speedometer reads a constant of 30 miles per hour. what is not constant?
the velocity is not constant.
a ball tossed vertically upward, reaches its highest point, and then falls back to its starting point. during this time the acceleration of the ball is always:
directed downward.