Chapter 5 Extra Problems
Name:
1.
The largest watermelon ever grown had a mass of 118 kg. Suppose this watermelon were
exhibited on a platform 5.00 m above the ground. After the exhibition, the watermelon is
allowed to slide along to the ground along a smooth ramp. How high above the ground
is the watermelon at the moment its kinetic energy is 4.61 kJ?
2.
Lake Point Tower in Chicago is the tallest apartment building in the United States
(although not the tallest building in which there are apartments). Suppose you take the
elevator from street level to the roof of the building. The elevator moves almost the
entire distance at constant speed, so that it does1.15
10
5
J of work on you as it lifts the
entire distance. If your mass is 60.0 kg, how tall is the building? Ignore the effects of
friction.

3.
One species of eucalyptus tree,
Eucalyptus regnens
, grows to heights similar to those
attained by California redwoods. Suppose a bird sitting on top of one specimen of
eucalyptus tree drops a nut. If the speed of the falling nut at the moment it is 50.0 m
above the ground is 42.7 m/s, how tall is the tree? Do you need to know the mass of the