Answer:
The potential energy is the energy possessed by the body by the position relative to other things. It is also known as stored energy
The formula is: P.E = mgh
P.E = mass * gravitational energy * height
Explanation:
Answer:
960J
Explanation:
Given parameters:
Force = 120N
Distance = 8m
Unknown:
Work required = ?
Solution:
The work done by a body is the force applied to move a body in a specific direction.
Work done = Force x distance
Insert the parameters and solve;
Work done = 120 x 8 = 960J
Answer:

Explanation:
Given:
length of the stick, 
position of holding the stick that acts as a hinge, 
mass of the object, 
position of hanging the mass on the meter stick, 
new position of hanging the mass, 
<u>Now the torque in the initial position:</u>

where:
acceleration due to gravity


Now when the mass is at the new position:



It's simple. You just need to apply formular onto problem.