A tube is fixed in a vertical plane as shown in the figure. From point A a sphere of mass 0.314 kg is
released. During its motion in the tube it faces a constant resistive force R.
At B its velocity becomes zero. Calculate (i) the constant resistive force R
and (ii) work done by resistive force (Average radius of semicircular path
is 1 m)
Answers
Answered by
2
Answer:
=mg+
r
B
2
l
2
v(t)
=−m
dt
dv
∫
V
v(t)
mg+
r
B
2
l
2
v(t)
dv
=∫
0
t
m
−dt
⟹ln
mg+
r
B
2
l
2
V
mg+
r
B
2
l
2
v(t)
=
mr
−tB
2
l
2
ln
269.6
19.6+50v(t)
=
mr
−tB
2
l
2
=−25t
v(t)=5.4e
−25t
−0.4
v(t)=0⟹t=0.1seconds
Heatloss=∫
0
0.1
i
2
rdt
=∫
0
0.1
r
2
B
2
v(t)
2
l
2
rdt
=10.92J
Answered by
0
Explanation:
Way to give answer is not good
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