Aball is launched with an inital velocity of 4.47 m/s at an angle of 66° above the horizontal. calculate how long did it take the ball to return to its launching hike. use -9.80 m/s^2 for the acceleration due to gravity.

0.833 seconds

Explanation:

Given:

y₀ = 0 m

y = 0 m

v₀ = 4.47 sin 66° m/s

a = -9.80 m/s²

Find: t

y = y₀ + v₀ t + ½ at²

0 = 0 + (4.47 sin 66°) t + ½ (-9.80) t²

0 = 4.08 t − 4.90 t²

0 = t (4.08 − 4.90 t)

t = 0, 0.833

It takes 0.833 seconds to return to its original launching height.

which three statements are true about all alloys?

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force