How much work would it take to push a #12 kg # weight up a # 5 m # plane that is at an incline of # pi / 12 #?

1 Answer
May 19, 2017

Answer:

I got #153J#

Explanation:

We can use the fact that the work will be equal to the (Grav.) Potential Energy #U=mgh# gained in changing height. The only thing is that the height #h# will be the vertical height obtained from trigonometry as:
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so that:
#h=5sin(pi/12)=1.3m#

Giving for Work:

#W=U=mgh=12*9.8*1.3=152.88~~153J#