Physics

posted by .

A small rock is thrown vertically upward with a speed of 17.0m/s from the edge of the roof of a 22.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected.
1. what is the speed of the rock just before it hits the street?
2. How long after the rock is thrown will it hit the street?

  • Physics -

    h(t) = 22.0 + 17.0t - 4.9t^2
    v(t) = 17.0 - 9.8t

    So, find t when h=0, and use that to find v at that instant.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A small rock is thrown vertically upward with a speed of 13.0 m/s from the edge of the roof of a 20.0 m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. …
  2. physics

    A small rock is thrown vertically upward with a speed of 13.0 from the edge of the roof of a 31.0 tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected …
  3. physics

    A small rock is thrown vertically upward with a speed of 13.0from the edge of the roof of a 37.0 tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. …
  4. physics

    A rock is shot vertically upward from the edge of the top of a tall building.The rock reaches its maximum height above the top of the building 1.90 s after being shot. Then, after barely missing the edge of the building as it falls …
  5. Physics

    A small rock is thrown vertically upward with a speed of 17.0m/s from the edge of the roof of a 32.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. …
  6. Physics

    A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Take the acceleration …
  7. Physics

    Four rocks are thrown horizontally from a building, with varying speeds and from various floors. Rock 1 lands a distance r away from the building, rock 2 lands 2r away from the building, rock 3 lands at distance 3r, and rock 4 at 4r. …
  8. Physics

    A small rock is thrown vertically upward with a speed of 14.0m/s from the edge of the roof of a 25.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. …
  9. Physics

    A rock is thrown directly upward from the edge of the roof of a building that is 35.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects …
  10. Physics

    A rock is thrown directly upward from the edge of the roof of a building that is 40.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects …

More Similar Questions