Question

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required? 

a. 100 watts

b. 400 watts

c. 104 watts

d. 50 watts

​

Answer 1

hence power is 100watt

Answer 2

Given,

Magnitude of force = 100 N

Displacement = 2 metres

Time = 2 seconds

To find,

Amount of used power.

Solution,

We can simply solve this numerical problem by using the following process.

First of all, we have to calculate the magnitude of work done.

Work done = Force × Displacement

Or,

Work done = 100 × 2 = 200 joules

Now, we have to calculate the power.

Power = Work done/ Time

Or,

Power = 200/2 = 100 watts

(This will be considered as the final result.)

Hence, 100 watts of power is used. (option a)