A ball is thrown at a 30 angle above the horizontal across level ground. it is released from height of 2.00 m above the ground with a speed of 24.0m/s. how far does the ball travel horizontally before it strikes the ground?

87.44m

Explanation:

Using the equation of motion

S = ut+1/2gt²...1 where

S is the distance covered by the ball

u is the velocity = 24m/s

t is the time of flight

g is the acceleration due to gravity = 9.81m/s

theta = angle of inclination = 30°

Before we can get the distance, we need to get the time of flight

t = 2usin(theta)/g

t = 2(24)sin30°/9.81

t = 48(0.5)/9.81

t = 24/9.81

t = 2.45s

Substituting t = 2.45s into equation 1 to get the distance S

S = 24(2.45)+1/2(9.81)(2.45)²

S = 58.8+29.44

S = 87.44m

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2