Answer:
a) 79.7rad/s
b) -18.7rad/s^2
c) 53m
Explanation:
We will use the MKS system of unit, so:

now, The angular speed is given by:

in order to obtain the angular acceleration we have to apply the following formula:

The linear displacement is given by:

Answer:
The speed when se reaches the top of the incline is 0.28 m/s
Explanation:
The work done is equal to the change of kinetic energy, then:
Wg + Wf + Wn = ΔEk
Where
Wg = work done by gravity
Wf = work done by force
Wn = work done by normal force

Where
m = 8.5 kg
g = 9.8 m/s²
d = 39.93 m
F = 37.4 N
vf = 2 m/s
Replacing:

Answer:
d = 0.391 m
Explanation:
given,
mass of sled = 18 kg
inclined at an angle of = 28°
kinetic friction between the sled and inclined = 0.25
using energy equation






d = 0.391 m
hence, the distance traveled by the sled is equal to 0.391 m
The answer & explanation for this question is given in the attachment below.