Question

if the workdone (y) by a body on application of a constant force is directly proportional to the distance(x) travelled by the body,express this in form of an equation in two variables and draw the graph of the same by taking the constant force as 3 units. Also find the work done from the graph when the distance travelled by the body is 2 units.​

Answer 1

x0 2 3  y05 10 

Let x units be the distance traveled by the body and y units be the work done by constant force.

According to problem, y=5x     ...(1)

Now , putting the value x=0 in (1)

y=5×0=0

So, the solution is (0,0)

Putting the value x=1 in (1)

y=5×1=5

So, the solution is (1,5)

Putting the value x=2 in (1)

y=5×2=10

So, the solution is (2,10)

(i) When x=2 units (distance)

Putting the value x in (1)

y=5x

y=5×2=10.

Hence, Work done =10.

(ii) When x=0 units (distance)

Putting the value x in (1)

y=5x

y=5×0=0.

Hence, work done =0.