Answer:
efficiency of a machine is less than 100% because some part is energy is utilized to overcome some opposing forces like friction which is wasted as heat ,sound energy etc
Explanation:
Answer:
rotation
Explanation:
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Answer:
Add items to the box
Explanation: I did the test
All it does is lets him pull in a more convenient direction to raise the load. It has no effect on the required force.
Answer:
Explanation:
Explain how a projectile might be modified to decrease the air resistance impacting its trajectory.
