Activity Title: Mechanical Energy
Learning Target : To determine the mechanical energy of a system. Consider a simple pendulum with a bob mass 4.2 kg
Questions:
1. If the speed of the bob at the lowest point B is 0.84 m/s , What is its kinetic energy at this point?
2. If points A and C are the highest points reached by the bob, What is the potential energy if h= 0.036m at these points.?
3. What is the kinetic energy of the bob points A and C ?
4. What is the potential energy at point B.?
5. What is the total mechanical energy at point A.?
6. What is the total mechanical energy at point B.?
Gives
M=4.2kg
Point B velocity
Point A and C hiegh
h=0.036m
Part(a)
Kinetic energy of lowest point
Part(b )
Point (A) and Point (B) potential energy
PE=
Part (c)
Kinetic energy of point ( A)and (c)
At Point( a) and point( c) kinetic energy equal zero
part(d)
Potential energy at point B
At Point (B) potential energy is zero
part(e) total machanical energy point (A)
(Machanical energy ) =
Machanical energy at point (A) =0+mgh
ME=mgh
ME=1.48176J
Part(f)
Machanical energy at point (B)
Mechanical energy at point B
Comments
Thankyou for this,i understand alot now!
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