a cable lifts a 1200 kg elevator at a constant velocty for a distance of 35 m. what is the work done by (a) the tension in the cable and (b) the elevators weight
2007-10-15 19:08:13 · 2 answers · asked by smarin1987 2 in Science & Mathematics ➔ Physics
The tension in the cable is the same as the elevator's weight if the elevator is moving at constant velocity. The work done can be found in two ways: the force (tension or weight) times distance = m*g*h, or the change in potential energy, also = m*g*h. Here m = 1200kg, h = 30m. The work done by tension (force x distance) is the same as the work done by the elevator's weight (=potential energy change).
2007-10-15 19:47:14 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋
Work = Force x Distance
Weight = Mass x Acceleration due to gravity
Tension - the system is in steady state.
2007-10-16 02:23:33 · answer #2 · answered by Anonymous · 0⤊ 0⤋