Question

find work if:
initial velocity =0
final velocity =6ms^-1
time=30s
mass=5kg​

Answer 1

Answer:

Explanation:

Work, is just simply calculated as energy. It can be calculated by inputting it into the Conservation of Energy equation.

Example

For example, imagine a block of mass 1 kg in front of you, currently at rest. At the initial phase, total energy of the block in accordance to you is 0. Then, you decide to give the block a small push, which makes it move with a velocity of 2 m/s. Now, the total energy of the block is $mv^2/2$

Since net energy should be conserved, initial energy is equal to final energy.

W = $mv^2/2$

That is, as soon as you pushed to block, it converted your work done to kinetic energy.

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Now, in this question:

W = Final Net Energy = $mv^2/2$ = 5 x (36)/2 = 90 J

So, work done is equal to 90 J.

Now, an easy way to think of this problem is that at the complete beginning, everything was at rest. Then, you push the block. As soon as you push the block, you would leave it. So, the push transferred the energy from your hand to the block.

Hope it helps!

Answer 2

Answer:

daa enthe angane nee chodichathu,