contestada

A hydraulic hoist lifts a body to a height of 5m during a 20-second duration 11 the lifting power is 2.453 kW, calculate the mass of the body. (g = 9.81 m/s^2) (a)-940 kg (b)-960 kg (c)- 980 kg (d)-1000 kg

Respuesta :

Answer:

Mass of the body will be 1000 kg so option (d) is correct

Explanation:

We have given height h = 5 meter

Time t = 20 sec

And power P = 2.453 KW = 2453 watt

We know that work done = power × time = 2453×20 =49060 J

Now let m is the mass of the body then amount of work done in lifting the body through height h = mgh

So mgh = 49060

[tex]m\times 9.81\times5=49060[/tex]

m =1000 kg

So option (d) is correct

Otras preguntas