A projectile is launched at 37 degrees to the horizontal with a speed of 200 m/s from position A. How many seconds elapse after launch of the projectile before it returns to its original elevation at C?

24.5 s

Explanation:

We can calculate time of flight of a projectile using below formula

T = (2Usinθ)/g

g = acceleration due to gravity= 9.81 m/s^2

U = initial velocity= 200 m/s,

θ = horizontal angle of projection= 37°

Sin(37°)= 0.60

If we input the values above, we have

=(2× 400×0.60)/9.81

= 480/9.81

T = 24.5 s

Hence, it takes 24.5 s before the projectile it returns to its original elevation at C

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

0.11 m/s and 0.28 m/s should be correct