JAMB - Physics (1986 - No. 10)
A 1000kg elevator is descending vertically with an acceleration of 1.0ms-2, if the acceleration due to gravity is 10ms-2, the tension in the suspending cable is
1.0N
10.0N
9000.0N
11 000N
Објашњење
T = , m = 1000kg, a = 1\(ms^{-1}\), g = 10\(ms^{-2}\)
W - T = ma
T = W - ma
T = mg - ma
T = m( g - a )
T = 1000( 10 - 1) = 1000 x 9 = 9000N.