awanita is placing items on a shelf that is 200 cm above the ground. she exerts a force of 20 n to lift a…

awanita is placing items on a shelf that is 200 cm above the ground. she exerts a force of 20 n to lift a box from the floor to the shelf. she does this in 5 s. what is awanitas power output? (power: p = w/t) 4 w 8 w 40 w 800 w

awanita is placing items on a shelf that is 200 cm above the ground. she exerts a force of 20 n to lift a box from the floor to the shelf. she does this in 5 s. what is awanitas power output? (power: p = w/t) 4 w 8 w 40 w 800 w

Answer

Explanation:

Step1: Calculate work done

Work (W) = Force (F)×Distance (d). First convert distance to SI - unit. 200 cm = 2 m. So, W = F×d = 20 N×2 m = 40 J.

Step2: Calculate power

Power (P) = W/t. Given t = 5 s and W = 40 J. Then P = 40 J/5 s = 8 W.

Answer:

8 W