physics

posted by .

A brick is released with no initial speed from the roof of a building and strikes the ground in 1.50 {s}, encountering no appreciable air drag.

A. How tall, in meters, is the building?

B.How fast is the brick moving just before it reaches the ground?

  • physics -

    a. h = 0.5gt^2
    h = 0.5 * 9.8 * (1.5)^2 = 11m.

    b. V = gt = 9.8 * 1.5 = 14.7m/s.

  • physics -

    12345678910

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A brick is thrown vertically upward with an initial speed of 4.40 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?
  2. Physics

    A brick is thrown vertically upward with an initial speed of 4.40 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?
  3. physics

    A brick is thrown vertically upward with an initial speed of 5.00 m/s from the roof of a building. If the building is 112.0 m tall, how much time passes before the brick lands on the ground?
  4. Physics

    A brick is thrown vertically upward with an initial speed of 4.40 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?
  5. physics

    a brick is dropped (0 initial speed) from the top of a building. the brick strikes the ground in 2.5 seconds. you may ignore air resistant so the brick is in free fall. A)how tall in meters is the building?
  6. physics

    A brick is released with no initial speed from the roof of a building and strikes the ground in 1.50 {s}, encountering no appreciable air drag. A. How tall, in meters, is the building?
  7. physics, please help me, this question is hard

    John Stands at the edge of a flat roof of a three story building and throws a 180g ball straight up into the air that reaches a height of 3.0 meters above the roof. ( building is 14 meters high) A. What is the initial speed of the …
  8. physics

    A 4.20-kg watermelon is dropped from rest from the roof of a 28.0-m -tall building and feels no appreciable air resistance. Calculate the work done by gravity on the watermelon during its displacement from the roof to the ground. Just …
  9. Physics

    A baseball is projected horizontally from the top of a building with an initial speed of 15 m/s. The ball strikes the ground 25 m from the base of the building. a. How long will it be in the air?
  10. physics

    A brick is dropped (zero initial speed) from the roof of a building. The brick strikes the ground in 3.05 s. You may ignore air resistance, so the brick is in free fall. (a) How tall, in meters, is the building?

More Similar Questions