wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A 40 kg girl is swinging on a swing from rest. Then, the power delivered when moving with a velocity of 2 m/s upwards in a direction making an angle 60 with the vertical is

A
2483 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
3923 W
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
448 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
580 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 3923 W
Two force are acting on bob, tension and weight. Power of tension will be zero and that of weight is,

P = mgv cos(90+θ)
P = mgv cos(90+60)
=mgv. sin60
=40×9.8×2×32=3923 W
Power delivered is 3923 W

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon