Question

How do inertia and centripetal force combine to keep an object moving in circular motion?

Answer 1

Answer:

see

Explanation:

i dont know

Answer 2

Explanation:

The time taken for the project lent reach the ground equals to the time it takes to covers the horizontal distance.

The time it takes to reach the ground from a height of 490 m is :

S = ut + 0.5gt²

g = 9.8

Doing the substitution:

490 = - 98t + 4.9t²

Multiplying through by 10 to get rid of the decimal we have :

49t² - 980t - 4900 = 0

Solving this using the quadratic formula :

t = {980 +/- √(980² + 4× 49 × 4900)} / 98

t = - 4.14 or 24.14

Since time is positive, we take 24.14 seconds

The horizontal distance covered by the projectile is thus :

The horizontal velocity is equivalent to the initial velocity of the projectile and it is constant.

24.14 × 98 = 2365.72m