Part A
What is the acceleration of the bowling ball, in magnitude and direction, at this instant?
/
ms
2
Part B
What is the tension in the rope at this instant?
N
Problem 5.72
Block
A
in the figure (
Figure 1
) weighs 68.2
N
. The coefficient of static friction between the block and the
surface on which it rests is 0.29. The weight
w
is 10.1
N
and the system is in equilibrium.
Exercise 6.5
A 75.0-
kg
painter climbs a ladder that is 2.71
m
long leaning against a vertical wall. The ladder makes an
26.0
∘
angle with the wall.
Part A
How much work does gravity do on the painter?
W
=
J
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My Answers
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Up

Part B
Does the answer to part A depend on whether the painter climbs at constant speed or accelerates up the
ladder?
Does the answer to part A depend on whether the painter climbs at constant speed or accelerates up the
ladder?
Yes
No
Exercise 6.8
A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant
force
F
⃗
=(
29
N
)
i
^−(
35
N
)
j
^
to the cart as it undergoes a
displacement
s
⃗
=(−
8.8
m
)
i
^−(
3.7
m
)
j
^
.
Part A
How much work does the force you apply do on the grocery cart?

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