a tennis ball is hit from a height h above the ground with a speed V and at an angle alpha to the horizontal. it hits a wall at a horizontal distance d away . Air resistance is negligible
i was told to find expressions for the height and velocity of the ball for which i did shown below
Vx = Vo*cos(alpha)
Where :
Vo is the initial velocity
alpha is the launch angle
Vx is the x component of velocity
Vy = Voy*sin(alpha) - g*t
From the pythagorean theorem V = sqrt(Vx^2+Vy^2)
X = Vo*cos(alpha)*t
Y = Vo*sin(alpha)*t - 1/2*g*t^2
Assuming that i started at (x,y) = (0,0) i will then end upat the point (D,h)
that was the first part of the quesiton...but the part im stuck on is ...auusuming that the coefficient of restitution between the tennis ball and the wall is e, i need to write down an expression for te the velocity of the ball immediately after impact......is there anyone that can help ???thankz
i was told to find expressions for the height and velocity of the ball for which i did shown below
Vx = Vo*cos(alpha)
Where :
Vo is the initial velocity
alpha is the launch angle
Vx is the x component of velocity
Vy = Voy*sin(alpha) - g*t
From the pythagorean theorem V = sqrt(Vx^2+Vy^2)
X = Vo*cos(alpha)*t
Y = Vo*sin(alpha)*t - 1/2*g*t^2
Assuming that i started at (x,y) = (0,0) i will then end upat the point (D,h)
that was the first part of the quesiton...but the part im stuck on is ...auusuming that the coefficient of restitution between the tennis ball and the wall is e, i need to write down an expression for te the velocity of the ball immediately after impact......is there anyone that can help ???thankz
