An earthworm moves by using two different sets of muscles. 2. FISHES :- Fish swim by flexing their bodies and tail back and forth. Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side.
Answer:
Part a)

Part b)

Part c)

Part d)

Part e)

Part f)
It is independent of the speed of the object so all part answers will remain the same
Explanation:
Part a)
As we know that Point P is at height 5R while point Q is at height R
so the work done by gravity from P to Q is given as



Part b)
When it reaches to the top of the loop then its final height from ground is
h = 2R
so work done from P to Q is given as



Part c)
Potential energy at P point is given as



Part d)
Potential energy at Q point is given as



Part e)
Potential energy at top point is given as



Part f)
Since all the answer from part a) to part e) depends only upon the position of the object.
So here we can say that it is independent of the speed of the object so all part answers will remain the same
Explanation:
Average velocity: 6.01×103 m/s.
Velocity at time t=0 s : 0 m/s.
Velocity at t=10 s : 2.40×104 m/s.