Question

A motor is lifting an object with a mass of 35 kg at a constant speed of 6 ms. Calculate the power developed by the motor.​

Answer 1

Answer:

2058 watt or 2.058 Kilo watt

(for g = 9.8m/s²)

Explanation:

We know, power = work/time.

work= force × distance

So, power = Force × distance / time

also, we know that distance/ time = speed

hence, power = force × speed

Now,

force = mass × acceleration due to gravity (g)

= 35 × 9.8 = 343 Newton (talking g= 9.8m/s²)

power generated by motor = 343 × 6

= 2058watt or 2.058 kilo watt

Note if you take g = 10m/s² then you answer will be 2100watt or 2.1killowatt.

Since no value of g is given we take it as 9.8m/s².