Need Part B please Part A How much work is done when a 175 g tomato is lifted 16

Question

Need Part B please

Part A

How much work is done when a 175 g tomato is lifted 16.6 m ?

Express your answer with the appropriate units.

Hints

28.5 J

Correct

The energy transferred to the tomato by doing work on it increases its potential energy because the tomato is now at a greater height or position relative to the ground.

Part B

The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground? Assume 83.9 % of the work done in Part A is transferred to kinetic energy, E, by the time the tomato hits the ground.

Express your answer with the appropriate units.

28.5 J

Explanation / Answer

A)

work done = increase in potential energy of tomato

work done = m*g*h

Here:

m = 175 g = 0.175 Kg

g = 9.8 m/s^2

h = 16.6 m

work done = m*g*h

work done = 0.175 Kg * 9.8 m/s^2 * 16.6 m

work done = 28.5 J

Answer: 28.5 J

B)

Kinetic energy = 83.9 % of 28.5 J

Kinetic energy = 83.9 * 28.5 / 100

Kinetic energy = 23.9 J

Now use:

kinetic energy = 0.5*m*v^2

23.9 J = 0.5* 0.175 Kg * v^2

v = 16.5 m/s

Answer: 16.5 m/s

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