Physics problem regarding energy, work, and power. (Diagram will be posted shortly... :P)

The figure (to be drawn) shows a motor used to lift a block of concrete. The mass of the block is 700 kg and the mass of the cradle is 50 kg. Take the gravitational field strength as 10 N/kg.

1. Calculated the work done if the motor lifts the block from rest at a constant speed through a vertical height of 12 m from the ground, then stops. (My answer: 90,000 J?)

2. Calculated the speed of the load as it is lifted up.

3. Calculated the tension in the wire as the load is lifted up.

Question

Physics problem regarding energy, work, and power. (Diagram will be posted shortly... :P) 

The figure (to be drawn) shows a motor used to lift a block of concrete. The mass of the block is 700 kg and the mass of the cradle is 50 kg. Take the gravitational field strength as 10 N/kg.

1. Calculated the work done if the motor lifts the block from rest at a constant speed through a vertical height of 12 m from the ground, then stops. (My answer: 90,000 J?)

2. Calculated the speed of the load as it is lifted up.

3. Calculated the tension in the wire as the load is lifted up.

anonymous · Answer

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