Question

A construction worker is using a pulley system to lift a heavy beam. The worker applies an effort force of 200 N, and the beam is lifted a height of 4 meters. The resistance force of the beam is 800 N.

Answer 1

It will take 800 joules of work to lift the beam.

Step-by-step explanation:

Effort Force (F_effort) = 200 N

Resistance Force (F_resistance) = 800 N

Height lifted (h) = 4 meters

To calculate the work done by the construction worker, you can use the formula for work:

Work (W) = Force (F) x Distance (d) x cos(θ)

In this case, θ represents the angle between the direction of the force and the direction of motion. Since the beam is lifted vertically, the angle θ is 0 degrees, and cos(0) = 1.

So, the work done by the construction worker is:

W = F_effort x h x cos(0)

W = 200 N x 4 m x 1

W = 800 joules (J)