Question

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​

Answer 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