# A How much work is done when a

A How much work is done when a 145 g tomato is lifted 10.6 m ?The tomato is dropped. What is the velocity, v, of the tomato whenit hits the ground? Assume 82.8 % of the work done in Part A istransferred to kinetic energy, E, by the time the tomato hits theground.

How much work is done when a 145 g tomato is lifted 10.6 m?

work done = mgh               = 0.145 Kg x 9.8m/s2 x 10.6 m          = 15.0626 J      Therefore, the work done when a 145g tomato is lifted to 10.6 m is:15.0626 J

The tomato is dropped. What is the velocity, v, of the tomatowhen it hits the ground?Assume 82.8 % of the work done in Part Ais transferred to kinetic energy, E, by the time the tomato hitsthe ground.

Answer: work done is converted into 82.8 % of .kineticenergy

Therefore, the kinetic energy = (82.8/100)x 15.0626 J                         = 12.472 J                 (1/2)mv2 = 12.472J       (1/2)(0.145 kg) v2 =12.472 J                                    v2 = 172                                     v = 13.115 m/sTherefore, the velocity of tomato when hits the ground = 13.115m/s

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