Answer:
Explanation:
Given
initially mass is stretched to 
Let k be the spring Constant of spring
Therefore Total Mechanical Energy is 
Position at which kinetic Energy is equal to Elastic Potential Energy


it is given

thus 



<span>an unbalanced force is Forces that are not equal</span>
Answer:
Explanation:
Given that
L= 15 m
T= 1.5 N
μ =0.0045 kg/m
f= 4 Hz
We know that
Velocity in string V is given as

Now putting the values in the above equation we get

We know that
V= f λ


Answer:

Explanation:
The moments of the whole object is the sum of the moments of the 2 segments of rod at their ends of which length is L/2 and mass M/2:



<span>The green car traveled a shorter distance, but the displacement of the cars was equal.</span>