1 answer:
Complete Question
The complete question is shown on the first uploaded image
Answer:
The value of
and
Explanation:
Considering the diagram,
Taking moment about the pivot , we have

=> 
Generally given that the bar is at equilibrium then the upward forces is equal to the down ward force
So

=> 
=>
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Anything above because the first part of the answers have less mass then the second part
Answer:
B= -6.0×10⁻⁴J
Explanation:
FIND THE SOLUTION BELOW
It is b) because you need to use your energy efficient for working
Piper rockelle and I just got off the phone number
Weight = (mass) x (gravity)
= (2.2 kg) x (3.7 m/s^2)
= 8.1 newtons. (about 1.84 pounds)