Author Question: A ball thrown vertically upward, at the top of its path (just before it starts to fall) has: a. an ... (Read 171 times)

jeatrice · **on:** Jul 28, 2018

A ball thrown vertically upward, at the top of its path (just before it starts to fall) has:
a. an instantaneous speed of zero.
b. the same instantaneous speed it had throughout its trajectory.
c. gone as low as it is going to go.
d. an instantaneous speed of 10 meters per second.
e. an acceleration of zero.

Question 2

Ignoring air resistance, which of these is the acceleration of a falling object?
a. The length of time it takes to reach the ground.
b. About 10 (meters per second) per second.
c. About 10 (meters per second) per meter.
d. About 10 meters per second.
e. Falling objects fall at different speeds, so none of these answers can be right.