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.