# Labor and Energy

#### Apprentice123

1975 the roof of the Montreal Velódromo which weighed 3.7x10^7N was raised 10cm to be centralized. What the work performed by machines that raised the roof

3.7x10^7

#### werehk

PHF Hall of Fame
you don't know the reason for the answer?

Since potential energy equals mgh,
puting figures into the equation
$$\displaystyle P.E. = mgh$$
$$\displaystyle P.E. = 3.7$$x$$\displaystyle 10^7(10)(0.1)$$
$$\displaystyle P.E. = 3.7$$x$$\displaystyle 10^7 J$$

Apprentice123

#### Apprentice123

you don't know the reason for the answer?

Since potential energy equals mgh,
puting figures into the equation
$$\displaystyle P.E. = mgh$$
$$\displaystyle P.E. = 3.7$$x$$\displaystyle 10^7(10)(0.1)$$
$$\displaystyle P.E. = 3.7$$x$$\displaystyle 10^7 J$$

Thank you. is obvious