Case Study: Painting the wall with the help of a ladder
A man is white washing a wall with the help of ladder of length 2 m
which is kept as shown in the given figure. Observe the figure and
answer the following questions.
la If the foot of the ladder is 1 m away from the wall and the length
of the ladder is 2 m. then find angle A
30
un 45
60
(u) 90
(b) Reber part la) and find sin B.
1
2
tim
to)
2
B.C
(c) Find sin
2
NY
చని
SI-
va
2
2
Answers
Answered by
1
Answer:
Mass of the bucket with the paint, m=0.6kg
Height at which the bucket is placed, h=2m
Potential energy of the bucket with the paint at the given height,
P.E.=mgh
=0.6×(9.8)×2
=11.76J
P.E. on the floor=0
Loss in potential energy=11.76−0=11.76J≈12J
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