A 20 kg black is placed on top of 50 kg block as shown in the figure. A horizontal force Facting
on A causes an acceleration of 3m/sto B. For this situation mark out the correct statements)
Rough
B
20 kg
50 kg
2m/s?
3m/s2
A
Smooth
1 The friction force between A and B is 40 N
2) The net forces against on A is 150 N
3) The value of Fis 190 N
4) All the above
Answers
Answered by
1
Answer:
Let f be the friction force on both the block A and B as shown in the FBD diagram.
A block has an acceleration of
3
m
s
−
2
F
−
f
=
50
×
3
eq(1)..
B block has an acceleration of
2
m
s
−
2
f
=
20
×
2
eq(2)...
on solving eq(1) and eq(2).
f
=
40
N
F
=
190
N
the total force acting on the A block is
F
−
f
=
190
−
40
=
150
N
.
Hence A,B and C is correct option
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