Physics, asked by ansh211107, 23 days ago

Rakesh of mass 50 kg climbs up a stair of 40 steps each 15 cm high in 1 minute and his wife Sulekha of mass 40 kg does the same in 2 minutes

(a) What is the ratio of work done by Rakesh and Sulekha?

(b) Compare the power developed by Rakesh and his wife.​

Answers

Answered by ramukaka87
1

Answer:

Work = displacement × force

Answered by arnavmhaskar
0

Answer:

Given: m

1

=40kgf,m

2

=30kgf,h

1

=h

2

,t

1

=4minutes=4×60sec,t

2

=3minutes=3×60sec

Comparing work done by them:

Work done by girl

Work done by a boy

=

m

2

gh

2

m

1

gh

1

=

m

2

m

1

=

30

40

=4:3

(ii) Comparing power developed by them:

Power developed by girl

Power developed by boy

=

Work done by girl / time taken to climb up the stairs in seconds

Work done by boy / time taken to climb up the stairs in seconds

=

3×60

1800

4×60

2400

=

4×60

2400

×

1800

3×60

=1:1

Similar questions