At 10 m/s, it will take
(2 m)/(10 m/s) =
0.2 sto bridge the gap.
_____
However, it will take an additional 0.514 seconds (0.714 s total) for the policeman to land on the building below. The answer depends on the meaning of the question.
Answer:
The equatiom of kinetic energy is 1/2×m×v² where m represents mass and v is velocity :

The unit for kinetic energy is measured in Joules (J).
Answer:
The source of all wave motion is a disturbance in matter or a vibration
Answer:
The total momentum after the collision is 1 kg-m/s.
Explanation:
We have,
Mass of a steel sphere is 0.5 kg
It is travelling with a speed of 2 m/s
It collides with an identical sphere at rest.
The law of conservation of momentum states that the initial momentum is equal to the final momentum for an isolated system. Here, initial momentum is :

So, the total momentum after the collision is 1 kg-m/s.