Answer:
Zero
Explanation:
It is given that,
A person swims to the other end of a 20m long pool and back.
We need to find his displacement.
Displacement = shortest path covered
He reaches at the same position as from where he has started. It means the shortest path covered is equal to 0 i.e. his displacement is zero.
Answer:
0 kg·m/s
Explanation:
At the peak, the ball's velocity is 0 m/s. So the momentum is:
p = mv
p = (0.50 kg) (0 m/s)
p = 0 kg·m/s
Explanation:
Density is measured in kg⋅m−2 . This means that it is derived from fundamental units which are the kilogram and metre.
Answer:
<em>The final velocity is 20 m/s.</em>
Explanation:
<u>Constant Acceleration Motion</u>
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Being a the constant acceleration, vo the initial speed, and t the time, the final speed can be calculated as follows:
![v_f=v_o+at](https://tex.z-dn.net/?f=v_f%3Dv_o%2Bat)
The provided data is: vo=10 m/s,
, t=2 s. The final velocity is:
![v_f=10~m/s+5\ m/s^2\cdot 2\ s](https://tex.z-dn.net/?f=v_f%3D10~m%2Fs%2B5%5C%20m%2Fs%5E2%5Ccdot%202%5C%20s)
![v_f=20\ m/s](https://tex.z-dn.net/?f=v_f%3D20%5C%20m%2Fs)
The final velocity is 20 m/s.