physics help please!

[sportsballa]

i have three problems that i need help with due tonight please help

1)A force of 303.0 N is used to push a 170 kg mass 30.0 m horizontally in 3.00 s.

(a) Calculate the work done on the mass. _____ KJ

2)An electric motor develops 73 kW of power as it lifts a loaded elevator 15.5 m in 35 s. How much force does the motor exert? ____ N

3)A box that weighs 720 N is lifted a distance of 20.0 m straight up by a cable attached to a motor. The job is done in 8.5 s. What power is developed by the motor in watts and kilowatts?
a) ____ W
b) ____ kW

PLEASE NEED HELP THANKS IN ADVANCE if you can post here or pm me thanks a lot

[theanswer0221]

i wish could help let me see if i can find anything online about it if i do i will pm u

[theanswer0221]

couldnt find anything sorry

[Shayne1911]

i hope you could get them figured out. i remember doing similar problems in my physics class last year, but i dont remember HOW to do them. lol

[ashley832]

I havent had physics in over a year so I dont remember much...but I did find this website that has several formulas listed and what each stands for..

http://www.geocities.com/ultrastupid...s-Formula.html

Hope that helps!

Ashley