If We Take -9.8 m/s^2 In Newton's Equation of Motion And acceleration due to Gravity is Always Negative Then Why we Can't Take -9.8 While Finding weight .
Answers
Answered by
1
Answer:
The moment of inertia of a solid disk about this axis is given in (Figure) to be
1
2
M
R
2
.
We have
M
=
50.0
kg
and
R
=
1.50
m
, so
I
=
(
0.500
)
(
50.0
kg
)
(
1.50
m
)
2
=
56.25
kg-m
2
.
To find the net torque, we note that the applied force is perpendicular to the radius and friction is negligible, so that
τ
=
r
F
sin
θ
=
(
1.50
m
)
(
250.0
N
)
=
375.0
N-m
.
Now, after we substitute the known values, we find the angular acceleration to be
α
=
τ
I
=
375.0
N-m
56.25
kg-m
2
=
6.67
rad
s
2
.
Similar questions