Question

An experiment showing the force applied on wooden plank and area is shown in following diagram. What will you conclude about this?

Answer 1

Explanation:

work done = ( shaded area under the graph

between x=0 to $$ x = 35m )

Work done = area of triangle (0 to 10s) + area of rectangle (10 to 30s) + area of trapezium (30 to 35s)

W=(

2

1

×10×10)+(20×10)+(

2

1

×(10+5)×5)

=287.5J.

HOPE IT'S HELPFUL.