Question

State the law of conservation of energy
A crate is pushed across a rough floor
with a constant force of 60 N. The mass
of the crate is 20 kg and its speed
reduces from 3.0 ms-1 to 1.0 ms-1 over
a displacement of 1.5 m. Calculate the
increase in the thermal energy of the
crate and the floor.
1+3​

Answer 1

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