Answer:
a) A = 0.603 m
, b) a = 165.8 m / s²
, c) F = 331.7 N
Explanation:
For this exercise we use the law of conservation of energy
Starting point before touching the spring
Em₀ = K = ½ m v²
End Point with fully compressed spring
= 
= ½ k x²
Emo =
½ m v² = ½ k x²
x = √(m / k) v
x = √ (2.00 / 550) 10.0
x = 0.603 m
This is the maximum compression corresponding to the range of motion
A = 0.603 m
b) Let's write Newton's second law at the point of maximum compression
F = m a
k x = ma
a = k / m x
a = 550 / 2.00 0.603
a = 165.8 m / s²
With direction to the right (positive)
c) The value of the elastic force, let's calculate
F = k x
F = 550 0.603
F = 331.65 N
Answer: D) none of the above
Explanation: This is a classic problem of thermodynamics, and refers to the principle of conservation of energy to give a correct answer
Option A) can be ruled out since no matter how much friction is reduced, it will always exist and therefore some energy will be lost
option B) and C) are out of context since the loss of work or energy will continue to exist even if those values are modified, so they do not answer the question
D) is the correct one since it should be said that this is not possible (so far...) as it goes against the conservation of energy and this option is none of the above
Answer:
(b) Both are the same
Explanation:
When work is done to change a position or a state of motion, then the potential and kinetic energy are created. Then the energy gets transferred to an object. Its means the work is done.
The work done to change a position of an object is called potential energy while the work done to change a state of motion of an object is called kinetic energy.
We know that the total energy of a system remains constant. It is called the law of conservation of energy.
So, the work done is equal to the amount of PE or KE created. Hence, the correct option is (b).
THE FORCE IS REMOVED BUT THE BODY DOES NOT RETURN TO ITS' ORIGINAL SHAPE (ALSO CALLED PERMANENT DEFORMATION)
