Question
Question: A 60 kg boy stands on a scale in the elevator. The elevator starts moving and records 450N. Find the...
A 60 kg boy stands on a scale in the elevator. The elevator starts moving and records 450N. Find the acceleration of the elevator.
A
2.5 ms-2upward
B
2.5 ms-2 downwards
C
2.5 ms-2 in either direction
D
None of these
Answer
2.5 ms-2 downwards
Explanation
Solution
450 = 60(g - a) or 60 a = 150a = 2.5 ms-2 downwards.