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1) Sid the Party Slug has a mass of 42 kg. He starts from rest and accelerates (like a
slug) through a distance of 141 m in 8.3 seconds.
42/kg
a) Calculate the acceleration of Sid.
FF
b) How much force does Sid exert.
my
c) At the end of the 141 meters, Sid reaches rough ground where the
coefficients of friction are µ, = 0.61 and µ = 0.48. Which coefficient of
friction do we use to determine Sid's acceleration?
d) Assuming the force exerted by Sid stays constant, calculate Sid's
acceleration while he is running on the rough ground.
e) How far does he travel before coming to rest?
ut = vitat
7x+
2) A block of wood with a mass of 1.5 kg falls off the back of a truck that is traveling at a
speed of 18 m/s. The coefficient of friction between the block and the concrete is 0.6. It
lands on the concrete and slides a distance of 20.66 m before reaching a dirt field.
a. What is the initial velocity of the block in the horizontal direction when it hits
the ground?
b. What is the acceleration of the block while it slides on the ground?
c. What is the final velocity of the block when it reaches the dirt field?
3
When the block reaches the dirt field, it continues to slide, but it travels a distance of
10 m before coming to rest.
d. What is the block's initial velocity when it starts sliding across the dirt field?
e. What is the block's acceleration while sliding on the dirt field?
f. What is the force acting on the wooden block while sliding on the dirt field?
g. What is the coefficient of friction between the wooden block and the dirt field?
m=
az?
8.3
