Answer:
This conveyor belt should be connected to fixed pulleys in case their total effort is less than the load. But if it's not that, the belt should be connected to movable pulleys.
Explanation:

Answer:
get a tutor or something to help man
Explanation:
Answer:
Explanation:
12.)
A. Opposite poles attract
B. Same poles repel
13.)
IDK
Answer:
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Answer:
it is actually very easy & interesting. first write formula of force F=Mass×Acceleration . now see what are the unknowns , mass is known but acceleration is not . so find acceleration, a=velocity/time , but now again we dont know velocity, V= distance/time . subbing in all the values, Force=Mass×(distance/time^2)
Hope it helps if you have any problem feel free to ask.