Aball is thrown with a speed of 20 m/s at an angle of 40o above the horizontal from the top of a 22-m tall building.

it hits a neighboring building 3.25 s later.

(a) how far away is the building, and (b) how fast was the ball going when it hit?

(a). The distance is  49.79 m.

(b). The speed of the ball is 24.39 m/s.

Explanation:

Given that,

Speed = 20 m/s

Angle = 40°

Height = 22 m

Time = 3.25 sec

(a). We need to calculate the distance

Using formula of distance

Put the value into the formula

(b). We need to calculate the horizontal velocity

Using formula of velocity

Put the value into the formula

We need to calculate the vertical velocity

Using equation of motion

Put the value into the formula

Negative sign shows the opposite direction.

We need to calculate the speed of ball

Using formula of speed

Hence, (a). The distance is  49.79 m.

(b). The speed of the ball is 24.39 m/s.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide