Question

A man pushes a 500-N box up a 5.0-m long ramp using a force of 300 N. The box was raised a vertical distance of 2.5 m. The actual work done by the worker was —

Answer 1

Answer:

1500 J of work done by the worker.

Explanation:

Given:

Weight of the box is 500 N.

Length of the ramp is 5.0 m.

Force applied by the worker is 300 N.

Vertical height raised is 2.5 m.

Now, work by a force is said to be done on a body when the force applied on the body causes a displacement in the direction of the force.

Here, the applied force by the worker is along the ramp and displacement along the ramp is the slant length of the ramp which is equal to 5.0 m.

Thus, work done by the worker is given as:

$Work=Force\times Displacement\\Work=(300\ N)\times (5.0\ m)\\Work=1500\ N\cdot m=1500\ J$

Therefore, the work done by the worker is 1500 J.