Asked by kelsey
A man lifts a 3 kg crate from the floor to a shelf (2 m high) at constant speed*.
What was the change in KE of the crate?
What is the change in the PE of the crate?
If it takes 2 s for the man to lift the crate to the shelf, find the man's power output.
What was the change in KE of the crate?
What is the change in the PE of the crate?
If it takes 2 s for the man to lift the crate to the shelf, find the man's power output.
Answers
Answered by
bobpursley
The energy (work) required to life any mass against a graviatational force is force*distance or mgh. This translates to a change of PE.
Power=work/time.
I will be happy to check your thinking.
Power=work/time.
I will be happy to check your thinking.
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