physics

posted by .

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.50 m/s at an angle of 24.0° below the horizontal. It strikes the ground 5.00 s later.
(a) How far horizontally from the base of the building does the ball strike the ground?
43.39 m
(b) Find the height from which the ball was thrown.
141.945 m
(c) How long does it take the ball to reach a point 10.0 m below the level of launching?
My answers for parts A and B are correct; I can't figure out C.
I tried using the equations delta y= Voy*t + (1/2)g*t^2, using 0 and 9.5sin24 as Voy, but neither worked. I solved the quadratic and got two irrational solutions or times greater than 5 seconds. My last attempt I used t=(2*distance/g)^(1/2)= 1.427seconds; this sounds somwhat logical. Could this be correct?

For (c), did you use -9.8 m/s^2 as the coefficient of t^2? . Did you use -10 m for y? You must consider the upward initial velocity component. Using the quadratic equation, I get a positive root of t=1.87 s.

I did try using both positive and negative g and 10. I also did one positive with one negative; I tried everything. This assignment is online, so I plugged in your answer and that's incorret also. I don't understand, but thanks for the help.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 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 from …
  2. Physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.70 m/s at an angle of 23.0° below the horizontal. It strikes the ground 6.00 s later. (Ignore air resistance.) (a) How far horizontally …
  3. 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 building …
  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 building …
  5. 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 …
  6. physics

    A)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 19.0o below the horizontal. It strikes the ground 2.50 s later. How far horizontally from the base of the …
  7. Physics

    a ball is tossed from an upper story window of a building given an initial velocity of 8m/s at an angle of 20 below the horizontal.it strikes the ground 2seconds later. how far horizontaly from the base of the building does it strike …
  8. physic

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.50 m/s at an angle of 15.0° below the horizontal. It strikes the ground 3.00 s later. (a) How far horizontally from the base of …
  9. physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50 m/s at an angle of 18.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of …
  10. Physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.40 m/s at an angle of 21.0° below the horizontal. It strikes the ground 6.00 s later. (a) How far horizontally from the base of …

More Similar Questions