Answer to Question #246335 in Mechanical Engineering for Jew

Question #246335
A 10 kg ball falls form the height of 100 m (a) calculate the vertical speed of the ball during the first 4 seconds ,(b) calculate the height of the ball above the gorund during the first 4 seconds ,(c) calculate the kinetic and potential energies of the ball.(d) determine the total mechanical energy of the ball?
1
Expert's answer
2021-10-05T13:37:02-0400

Let positive y-axis be pointing up. Then


(a)


(b)


(c)


(d)


The total mechanical energy of the ball is 9810 J and is conserved during the motion.



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