A) 720 N and 480 N
B) 480 N and 720 N
C) 600 N and 600 N
D) None of these
Correct Answer: A
Solution :
When the lift is accelerating upwards with constant acceleration a, then Weight \[w=m(g+a)\] \[=60(10+2)=60\times 12=720\,N\] When the lift is accelerating downwards at the rate of a, then Weight \[w=m(g-a)\] \[=60(10-2)=60\times 8=480N\]You need to login to perform this action.
You will be redirected in
3 sec