Question

Sarita has 1200 watt power , calculate the amount of mass lifted by her up to a distance of 10 mitre in 12 second

Answer 1

Answer:

Mass of the body is 146.93 kg

Explanation:

Definition of Power

Power is the rate of doing work

Given:

Power = 1200 watt

Distance = 10 metre

Time = 12 sec

acc. due to gravity (g) = 9.8 m/s²

Formulas Used

a = (v - a)/t

Power = Work/Time

Work = Force × distance

Force = Mass× acceleration

Solution

Now, Using above Formulas

Work = Power× time = 1200×12 = 14400 joule

Also,

Force = Work/distance = 14400/10 = 1440 kgm/s²

Also

Force = mass×gravity

or, mass = Force/gravity = 1440/9.8 kg = 146.93 kg

So, the mass of the body is 146.93 kg