A block of mass 1 kg is moving on a horizontal XY- plane in the influence of force F = 3 i + 4 j -5 k …

Q: A block of mass 1 kg is moving on a horizontal XY- plane in the influence of force $\vec{F} = 3 \hat{i} + 4 \hat{j} -5 \hat{k} $ . The acceleration due to gravity is directed in negative in negative z-direction find the normal reaction on the block by the plane.

(a) 10 N

(b) 15 N

(c) 20 N

(c) 5 N

Ans: (b)