I'm pretty sure its transverse waves
The velocity will remain unchanged (Newton’s 1st Law) unless a force acts on it. If no friction force, then the velocity remains constant.
The answer is A) solid iron at 25.C
Given data:
* The acceleration of the runner is,
* The initial velocity of the runner is,
* The time given is,
Solution:
By the kinematics equation, the final velocity of the runner is,
where v is the final velocity,
Substituting the known values,
Thus, the final velocity of the runner is 30.67 m/s.