physics

A ball thrown at an angle of 40 degrees with respect to the ground strikes a building 10m away at a height of 3m above the ground. The magnitude of the initial velocity is?

1. 👍 0
2. 👎 0
3. 👁 171
1. Vf^2 = Vo^2 + 2gd = 0,
Vo^2 + 2*(-9.8)3 = 0,
Vo^2 - 58.8 = 0,
Vo^2 = 58.8,
Vo(v) = 7.67m/s = Vertical component.

Vo = 7.67 / sin40 = 11.92m/s @ 40 deg.

1. 👍 0
2. 👎 0

Similar Questions

1. physics/calculus 3

A ball is thrown at an angle of 45 degrees to the ground. If the ball lands 90 m away, what is the initial speed of the ball?

asked by Anonymous on February 26, 2012
2. Calculus 3

A ball is thrown at an angle of 45 degrees to the ground. If the ball lands 90m away, what is the initial speed of the ball? I know you use x(t)=(v*cos(alpha))t and y(t)=(v*sin(alpha))t-g/2t^2 but I'm still really confused about

asked by Anonymous on February 26, 2012
3. physics

A child throws a ball with an initial speed of 8 m/s at an angle of 40 degrees above the horizontal. The ball leaves her hand 1 m above the ground. How long is the ball in flight before it hits the ground? What is the magnitude of

asked by Melissa on September 19, 2010
4. Physics

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 8.00 m/s and angle of 20.0 degrees below the horizontal. It strikes the ground 3.00 s later. (a) If the base of the

asked by Vico on September 21, 2009
5. Physics test review

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion.

asked by ann on November 8, 2014
1. Physics

A ball is thrown from a point 1.0 m above the ground. The initial velocity is 19.6 m/s at an angle of 30 degrees above the horizontal. Find the maximum height of the ball above the ground. Calculate the speed of the ball at the

asked by Anonymous on September 21, 2012
2. physics

An object is thrown with velocity v from the edge of a cliff above level ground. Neglect air resistance. In order for the object to travel a maximum horizontal distance from the cliff before hitting the ground, the throw should be

asked by me on December 29, 2006
3. physic

Hi! Question:A ball is tossed from an upper-story window of a building.The ball is given an initial velocity of 7.80m/s at an angle of 21.0 degrees below the horizontal.It strikes the ground 3.00s later. A.How far horizontally

asked by Chan on September 30, 2009
4. Physics

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 18.5o below the horizontal. It strikes the ground 3.30 s later. How far horizontally from the base of the

asked by Chloe on February 7, 2012
5. Physics

A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from the thrower, how long was it in the air? How high was the tallest spot in the ball's path?

asked by Luis on October 26, 2010
6. Physics urgent pls!

A ball is tossed from an upper-storey window of a building.The ball is given an initial velocity of 8 m/s at an angle of 20 degrees below the horizontal.it strikes the ground 3s later .(a) How far horizontally from the base of the

asked by Sammie on February 22, 2013