Homework Help: Physics

Posted by Alex on Sunday, October 30, 2011 at 5:30pm.

You throw a ball with a speed of 30 m/s at an angle of 40.0° above the horizontal directly toward a wall. The wall is 22.0 m from the release point of the ball.

(a) How long does the ball take to reach the wall?

(b) How far above the release point does the ball hit the wall?

(c) What are the horizontal and vertical components of its velocity as it hits the wall?

Physics - Henry, Tuesday, November 1, 2011 at 5:37pm
Vo = 30m/s @ 40deg.
Xo = hor. = 30cos40 = 23m/s.
Yo = ver. = 30sin40 = 19.28m/s.

a. Dh = VT = Hor. dist.
T = Dh / V = 22 / 23 = 0.96s =.
2t = T = 0.96,
t = 0.96 / 2 = 0.48s to reach wall.

b. t(up) = T/2 = 0.96 / 2 = 0.48s.
d(up) = Vo*t + 4.9t^2,
d(up)=19.28*0.48 -4.9(0.48)^2 = 8.125m

c. X = Xo = hor = 30cos40 = 23m/s.
Y^2 = Yo^2 + 2gd,
Y^2 = (19.28)^2 - 19.6*8.125 = 212.47,
Y = ver. = 14.6m/s.

Answer this Question

Related Questions

Physics - You throw a ball with a speed of 25 m/s at an angle of 40.0° above...
physics - Question Part Points Submissions Used A quarterback claims that he ...
physics - A boy throws a ball at 5.5 m/s at an angle of 25.4° above the ...
Physics - A quarterback claims that he can throw the football a horizontal ...
physics - A child throws a ball with an initial speed of 8 m/s at an angle of 40...
Physics - A boy throws a ball with an initial speed of 40.0 m/s. The angle of ...
Physics - If you can throw a ball vertically upward to a height h = 30.1 m, what...
Physics - If you can throw a ball vertically upward to a height h = 30.5 m, what...
Physics - You and your friend are practicing pass plays with a football. You ...
Physics - In the javelin throw at a track and field event, the javelin is ...

For Further Reading

First Name:
School Subject:
Answer: