Chapter 4
Part 2 of 2
Example Problems & Solutions
(useful for homework)
57
57. A 44-kg
57
44 kg
chandelier is
suspended 1
1.5
5m
below a ceiling by
three wires
wires, each
of which has the
same tension and
same length of 2.0
m Find the
m.
tension in each
wire.
wire
69
• 69
69. A student is skateboarding down a
ramp that is 6 m long and inclined at 18degrees with respect to the horizontal
horizontal. The
initial speed of the skateboarder at the top
of the ramp is 2
2.6
6 m/s
m/s. Neglect friction and
find the speed at the bottom of the ramp.
75
• 75
75. A person whose weight is 5
5.2
2 x 10^2
10 2 N
is being pulled up vertically by a rope from
the bottom of a cave that is 35
35.1
1 m deep
deep.
The maximum tension that the rope can
withstand without breaking is 569 N
N. What
is the shortest time, starting from rest, in
which the person can be brought out of the
cave ?