Question

A car resting at W has a maximum PE of 7000J.

Answer in one sentence

a. If the PE at Y is 3000J, what will be its KE at Y?

b. What is the mechanical energy at points W, X, Y, Z?

c. State the law which helped you to arrive at the above answer

Answer 1

Answer:

Given...

PE = 7,000J

Y = 3,000J

do Subtract,

7,000 - 3,000 = 4,000

therefore, X = 4,000J

we can take,

W, X, Y, Z as any one part

so, you can consider W, X, Y, Z as 4W or 4X or 4Y or 4Z

here,

4,000 = 4x

therefore, X = 4,000

￣4￣

X = 1,000

therefore, W = 1000

X = 1000

Y = 1000

Z = 1000

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