A lift moving upwards with a uniform acceleration of 5(ms^{-2}) carries a body of mass p kg. If the reaction on the floor is 480 N, find the value of p. [Take g = (10 ms^{-2})].
-
A.
32 -
B.
36 -
C.
48 -
D.
64
Correct Answer: Option A
Explanation
Reacting force – Weight = Net force
R = W + ma = mg + ma
480 = 10p + 5p
480 = 15p
p = 32 kg