A) 3200 N
B) 5400 N
C) 6500 N
D) 7800 N
Correct Answer: D
Solution :
Acceleration a of the elevator is given by \[{{v}^{2}}-{{u}^{2}}=2as\] \[\Rightarrow \] \[0-64=2\times a\times 16\] \[\Rightarrow \] \[a=-2\,\,m/{{s}^{2}}\] Let \[M\] be the total mass of the elevator, then \[T-Mg=Ma\] \[\Rightarrow \] \[T=M(g+a)\] \[=1000(9.8+2)\] \[=\mathbf{7800}\,\,\mathbf{N}\].You need to login to perform this action.
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