Step: 1

Step: 2

2E = m v 2

Step: 3

[Solve the equation for m .]

Step: 4

[Substitute: E = 2400, v = 30.]

Step: 5

Step: 6

The mass of the body is 5.33 kg.

Correct Answer is : 5.33 kg

Step: 1

Step: 2

2E = m v 2

Step: 3

[Solve the equation for m .]

Step: 4

[Substitute: E = 4850, v = 50.]

Step: 5

Step: 6

The mass of the body is 3.88 kg.

Correct Answer is : 3.88 kg

Step: 1

[Original equation.]

Step: 2

[add w on both sides.]

Step: 3

2(I + w ) = p

[Multiply by 2 on both sides.]

Step: 4

[Symmetry property.]

Correct Answer is : p = 2(l + w )

Step: 1

[Original equation.]

Step: 2

100 I = PTR

[Multiply by 100 on both sides.]

Step: 3

[divide by PR on both sides.]

Step: 4

[Symmetry property.]

Correct Answer is : T = 1 0 0 I P R

Step: 1

In a right triangle PQR , PR ^{2} = PQ ^{2} + QR ^{2}

[Given.]

Step: 2

[Subtract QR ^{2} from both sides.]

Step: 3

[Take square root on both sides.]

Step: 4

therefore, the length of the side PQ = P R 2 - Q R 2

Correct Answer is : PQ = P R 2 - Q R 2

Step: 1

[Original Formula.]

Step: 2

[Subtract 1 2 at ^{2} from both the sides.]

Step: 3

Step: 4

[Divide by t on both sides.]

Step: 5

[Symmetry property,]

Correct Answer is : u = s t - a t 2

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