A block of mass m=1 kg is at rest with respect to a rough wedge as shown.The wedge starts moving up from rest with an acceleration of a=2 m/s2 and the block remains at rest with respect to wedge. Then in 4 seconds of motion (if θ=30∘ and g=10 m/s2) work done on block. Column-IColumn-II(A)By gravity (in magnitude)(P)144 J(B)By normal reaction(Q)32 J(C)By frictional force(R)160 J(D)By all the forces(S)48 J Which of the following is the only CORRECT combination?

A block of mass m=1 kg is at rest with respect to a rough wedge as sho

1.	A block of mass m=1 kg is at rest with respect to a rough wedge as shown.The wedge starts moving up from rest with an acceleration of a=2 m/s2 and the block remains at rest with respect to wedge. Then in 4 seconds of motion (if θ=30∘ and g=10 m/s2) work done on block. Column-IColumn-II(A)By gravity (in magnitude)(P)144 J(B)By normal reaction(Q)32 J(C)By frictional force(R)160 J(D)By all the forces(S)48 J Which of the following is the only CORRECT combination?
Answer» A block of mass $m = 1 kg$ is at rest with respect to a rough wedge as shown.The wedge starts moving up from rest with an acceleration of $a = 2 {m / s}^{2}$ and the block remains at rest with respect to wedge. Then in 4 seconds of motion (if $θ = 30^{\circ}$ and $g = 10 {m/s}^{2}$ ) work done on block. $\begin{matrix} Column-I & Column-II (A) & By gravity (in magnitude) & (P) & 144 J (B) & By normal reaction & (Q) & 32 J (C) & By frictional force & (R) & 160 J (D) & By all the forces & (S) & 48 J \end{matrix}$ Which of the following is the only CORRECT combination?

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