How much work would it take to push a # 9 kg # weight up a # 3 m # plane that is at an incline of # pi / 4 #?

1 Answer
Feb 4, 2016

Answer:

#W=132,435 sqrt2 ##"Joules"#

Explanation:

#theta =180/cancel(pi)*cancel(pi)/4#
#theta =45^o#
#sin 45^o=sqrt2/2#
#h=3*sin 45^o#
#h=3*sqrt2/2 ##height#
#W=m*g*h#
#"Work=Potential Energy"#
#W=9*9,81*3*sqrt2/2#
#W=132,435 sqrt2 ##"Joules"#