Question

A ball thrown vertically upward is caught by
the thrower after 1.98 s.
Find the initial velocity of the ball. The
acceleration of gravity is 9.8 m/s2 .
Answer in units of m/s.
002 (part 2 of 2) 10.0 points
Find the maximum height it reaches.
Answer in units of m.

003 (part 1 of 2) 10.0 points
A car is traveling at 42.3 km/h on a flat
highway.
The acceleration of gravity is 9.81 m/s2 .
a) If the coefficient of kinetic friction be-
tween the road and the tires on a rainy day is
0.127, what is the minimum distance needed
for the car to stop?
Answer in units of m.
004 (part 2 of 2) 10.0 points
b) What is the stopping distance when the
surface is dry and the coefficient of kinetic
friction is 0.689?
Answer in units of m.

005 10.0 points
A motorboat accelerates uniformly from a ve-
locity of 6.8 m/s to the west to a velocity of
2.4 m/s to the west.
If its acceleration was 3.1 m/s2 to the east,
how far did it travel during the acceleration?
Answer in units of m.

Answer 1