Name: ______________________

Quiz 5

03/18/2005

Ch. 6-7

1)
A
ball of mass m is hanging by a massless string of length L from the
ceiling. The ball is pulled with the
string tight until it makes an angle q with the vertical and
then released.

a)
Ignoring
air resistance, what is the maximum speed of the ball?

b)
At
what angle does the maximum velocity occur?

2)
A
2kg bucket is pulled from the ground up to a window 10m above the ground at a
constant speed of .5 m/s using a massless rope.

a)
What
is the total Force on the bucket?

b)
What
is the tension force in the rope?

c)
How
much work does the tension force do?

d)
How
much work does the gravitational force do?

e)
What
is the change in potential energy?

f)
How
much power is required?