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# (Solved): Two motors provide the required tension in the cables raising the scaffolding shown below. The twopa ...

Two motors provide the required tension in the cables raising the scaffolding shown below. The two

painters each weigh 90 kg, and the total weight of the platform and motors is 100 kg. The platform should be

raised at a constant velocity of 0.5

m/s, and should reach this speed from rest with constant acceleration over a 0.2

second interval. For each pulley arrangement shown below determine the tension that must be supplied by each

motor to keep the platform at a constant speed, and tension to pro

vide the required acceleration from rest. What

c)

We have an Answer from Expert

Draw a free-body diagram for each object in the system, showing all the forces acting on it.
Label the forces and their directions. Assume the mass of the string and the pulley are negligible.

The free-body diagrams for each object are shown below:
|<-- T1 -->| |<-- T2 -->|
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
v v v v
+-----+ +-----+ +-----+
| m1 | | m2 | | m3 |
+-----+ +-----+ +-----+
^ ^ ^
| | |
W1 W2 W3

where T1 and T2 are the tensions in the strings, W1 = m1g, W2 = m2g, and W3 = m3g are the weights of the objects.

We have an Answer from Expert