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)\n4 w\n8 w\n40 w\n800 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)\n4 w\n8 w\n40 w\n800 w

Answer

Explanation:

Step1: Calculate work done

Work (W = F\times d), where (F = 20\ N) and (d=200\ cm = 2\ m). So (W=20\times2 = 40\ J).

Step2: Calculate power

Power (P=\frac{W}{t}), with (W = 40\ J) and (t = 5\ s). So (P=\frac{40}{5}=8\ W).

Answer:

8 W