A block is placed on a rough wedge fixed on a lift as shown in figure. A string is also attached with the block. The whole system moves upwards. Block does not lose contact with wedge on the block. Match the following two columns regarding the work done (on the block).

Column-I Column-II
A Work done by normal reaction P positive
B Work done by gravity Q negative
C Work done by friction R zero
D Work done by tension S Can’t say anything

see full answer

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

$A - Q, B - P, C - R, D - P$

$A - R, B - R, C - Q, D - P$

$A - P, B - Q, C - R, D - P$

$A - R, B - Q, C - R, D - R$

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Friction Force =0, as tension will serve that purpose

Angle between N and S or between T and S is acute

∴W_T and W_N are positive. Angle between S and mg is 180⁰.

Therefore, W_mg is negative.

Watch 3-min video & get full concept clarity