CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A plank is held at an angle α to the horizontal (Fig) on two fixed supports A and B. The plank can slide against the supports (without friction) because of its weight Mg. With what acceleration and in what direction, a man of mass "m" should move so that the plank not move.
694440_fbd78a138fb44471ba9d2d12e60e7137.png

A
gsinα(1+mM) down the incline
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
gsinα(1+Mm) down the incline
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
gsinα(1+mM) up the incline
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
gsinα(1+Mm) up the incline
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B gsinα(1+Mm) down the incline
Man should go down so that man apply frictional force on plank towards up.

Let a be the acceleration of man.

if plank is stationary, then frictional force;

f=Mgsinα and acceleration of man is a.

a=mgsinα+fm=(1+Mm)gsinα down the incline.

Option B is correct.


981203_694440_ans_9d4027e5b4534adeb239440f2e95ac0e.png

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