A child throws a ball with an initial speed of at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance. (a) What is the magnitude of the ball's velocity just before it hits the ground? (b) At what angle below the horizontal does the ball approach the ground?

Complete Question

A child throws a ball with an initial speed of 8.00 at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance. (a) What is the magnitude of the ball's velocity just before it hits the ground? (b) At what angle below the horizontal does the ball approach the ground?

Explanation:

From the question we are told that

Angle of ball

Height of ball h=1m

Generally the equation for vertical component  is mathematically given by

Generally the equation for horizontal component  is mathematically given by

Generally the equation for vertical displacement of ball is mathematically given by

Generally the velocity of ball before it hits the ground is mathematically given by

Magnitude

Direction of  ball

 beneath the horizontal

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards