Question

The v-t graph of a body of 5 Kg moving with the help of a force as shown in the figure.

Calculate the amount of work done by the force.​

Answer 1

Answer:

the answer is o

Explanation:

As net force is 0

Answer 2

Answer:

Work done = 250 N

Explanation:

★ Given ;

» V - T graph

» Mass of object = 5 kg

» Acceleration ( a ) = ??

» Displacement ( d ) = ??

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[ ★★ To find Displacement and acceleration from V - T graph we do as follow ; ]

1 ] Acceleration ( a ) = Slope of V - T graph

[ Slope = Tan ∅ ]

Acceleration = tan ∅ = Perpendicular / base = 10 / 4 = 2.5

Acceleration ( a ) = 2.5 m / s²

2 ] Displacement ( d ) = Area of V - T graph ★

Displacement = 1 / 2 × 10 × 4 = 20

» d = 20 metres .

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Work Done = Force • Displacement Cos ∅

W = m × a • d cos 0

W = 5 × 2.5 × 20 × 1

W = 50 × 5

★ Work done ( W ) = 250 N . ★