Certain force acting on a 20 kg mass changes its velocity from
5 ms-to 2 ms-. Calculate the work done by the force
5. A mass of 10 kg is at a point A on a table. It is moved to an
B. If the line joining A and B is horizontal, what is the work
done on the object by the gravitational force? Explain your
answer.
Answers
Answered by
1
Answer:
w=210
Explanation:
W = change in kinetic energy
W = ½mv² - ½mv²
w = ½×20×5² - ½×20×2²
w = ½(20×25) - ½(20×4)
w = ½(500 - 80)
w = ½(420)
w = 210
please mark my answer as brain list
Similar questions