Register Now


Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Add question

You must login to ask question .


Register Now

Lorem ipsum dolor sit amet, consectetur adipiscing elit.Morbi adipiscing gravdio, sit amet suscipit risus ultrices eu.Fusce viverra neque at purus laoreet consequa.Vivamus vulputate posuere nisl quis consequat.

How much Work?

1) How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m?

Known variables:

mass (m): 1000 kg

height (h): 100m

Work = Force x Distance

We need to find a force. Since there is gravity, all we have to do is multiply it by the mass to get the Force.

1000 x 9.81 = 9810N

w = f x d, so w = 9810 x 100 = 981000 Joules.

W_{{\rm ext}} =9.8×105 J
2) How much power must the motor supply to do this in 50 s at constant speed?

Power = work / time.

P = 981000/50 = 19620 watts.

P =2.0×104 W

About Vita

Comment ( 1 )

  1. You could certainly see your enthusiasm in the work you write. The arena hopes for even more passionate writers like you who aren’t afraid to say how they believe. All the time go after your heart.|

Leave a reply