Fred is playing baseball with his friends in a vacant lot. fred hits the ball at an angle of 40 degrees (at a height of 1.0m) and it crashes through the 3.4m high window of mr. jenkins house 67m away. what speed did fred give to the ball

Speed, v = 26.5 m/s                    

Explanation:

It is given that,

The ball hits the ball at an angle of 40 degrees.

Initial height of the ball, h = 1 m

Vertical distance, y = 3.4 m

Horizontal distance, x = 67 m

The trajectory of the particle in projectile motion is given by :

R is the range of projectile.

Putting all the values in above equation as :

R = 71.3 meters

Now using the formula of the range of the projectile as :

Substituting the values in above equation as :

u = 26.5 m/s

So, the speed with which Fred give to the ball is 26.5 m/s. Hence, this is the required solution.