Velocity-time graph for a body of mass 10 kg is shown in figure. Work-done on the body in first two seconds of the motion is :

Question

Velocity-time graph for a body of mass 10 kg is shown in figure. Work-done on the body in first two seconds of the motion is : (A) 12000 J (B) -12000 J (C) -4500 J (D) -9300 J

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/45bea85c97b56ae1d3d2ce0d213e6e0c-.png" /> (8/V)=(10/50) V=40 m / s W=(1/2) × 10 ×(1600-2500) =(1/2) × 10 ×(-900) =-4500 J

Q. Velocity-time graph for a body of mass $10 k g$ is shown in figure. Work-done on the body in first two seconds of the motion is :

12000 J

-12000 J

-4500 J

-9300 J

$\frac{8}{V} = \frac{10}{50}$
$V = 40 m / s$
$W = \frac{1}{2} \times 10 \times (1600 - 2500)$
$= \frac{1}{2} \times 10 \times (- 900)$
$= - 4500 J$

Q. Velocity-time graph for a body of mass 10kg is shown in figure. Work-done on the body in first two seconds of the motion is :