Two blocks are connected by a very light string passing over a massless and frictionless pulley (Figure 1) Traveling at constant speed, the 20.0 NN block moves 90.0 cmcm to the right and the 12.0 NN block moves 90.0 cmcm downward. 1.  During this process, how much work is done on the 12.0 NN block by gravity? Express your answer with the appropriate units. 2.  During this process, how much work is done on the 12.0 NN block by the tension in the string?

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Two blocks are connected by a very light string passing over a massless and frictionless pulley (Figure 1) Traveling at constant speed, the 20.0 NN block moves 90.0 cmcm to the right and the 12.0 NN block moves 90.0 cmcm downward.

1. 

During this process, how much work is done on the 12.0 NN block by gravity?
Express your answer with the appropriate units.
2. 
During this process, how much work is done on the 12.0 NN block by the tension in the string?
Express your answer with the appropriate units.
3. 
During this process, how much work is done on the 20.0 NN block by gravity?
Express your answer with the appropriate units.
4. 
During this process, how much work is done on the 20.0 NN block by the tension in the string?
Express your answer with the appropriate units.
5. 
During this process, how much work is done on the 20.0 NN block by friction?
Express your answer with the appropriate units.
6. 
During this process, how much work is done on the 20.0 NN block by the normal force?
Express your answer with the appropriate units.
 
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