1. Questions

PHYSICS HELP

A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 31 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s .

a.Assuming that air resistance can be ignored, find the initial speed of the rock .
v0= M/S

b. Find the greatest height of the rock as measured from the base of the cliff.
Hmax= m

  1. 👍
  2. 👎
  3. 👁
ANONYMOS

  1. b. V^2 = Vo^2 + 2g*hmax.
    29^2 = 0 + 19.6*hmax,
    hmax = 42.9 m. = Max. ht. above gnd.

    ho + h1 = hmax.
    31 + h1 = 42.9,
    h1 = 11.9 m. above the cliff.

    a. V^2 = Vo^2 + 2g*h1.
    0 = Vo^2 -19.6*11.9,
    Vo^2 = 233.2,
    Vo = 15.3 m/s = Velocity at which the rock was released.

    1. 👍
    2. 👎
    Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A rock is thrown vertically upward with a speed of 14.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? in s What is the

  2. Math

    A rock is thrown upward with a velocity of 12 meters per sec from the top of a 25 meter high cliff and it misses on it's way back down. When will the rock be 3 meters from water

  3. Physics

    rock is thrown downward from the top of a cliff with an initial speed of 12 m/s, disregarding air resistance if the rock hits the ground after 2.0 s, what is the height of the cliff

  4. Algebra

    A rock is thrown upward with a velocity of 14 meters per second from the top of a 20 meter high cliff, and misses the cliff on the way back down. When will the rock be 12 meters from ground level

  1. college algebra

    A rock is thrown upward with a velocity of 28 meters per second from the top of a 38 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below? Round your answer to two

  2. Math

    A rock is thrown upward with a velocity of 18 meters per second from the top of a 37 meter high cliff, and it misses the cliff on the way back down. When will the rock be 3 meters from ground level? Round your answer to two

  3. algebra

    A rock is thrown upward with a velocity of 15 meters per second from the top of a 30 meter high cliff, and it misses the cliff on the way back down. When will the rock be 10 meters from the water, below? Round your answer to two

  4. physics

    a rock is thrown vertically upward from ground level at t=0. At t= 1.5s, it passes the top of a tall tower and 1.0 s later, it reached its maximum height. what is the height of the tower?

  1. 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

  2. Math

    A rock is thrown upward with a velocity of 24 meters per second from the top of a 50 meter high cliff and it misses the cliff on the way back down. When will the rock be 7 meters from the water below

  3. algebra

    a rock is throw upward with a velocity of 24 meters per second from the top of a 38 meter cliff, and it misses the cliff on the way back down. When will the rock be 2 meters from ground level?

  4. Algebra

    A rock is thrown upward with a velocity of 21 meters per second from the top of a 48 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below? Round your answer to two

You can view more similar questions or ask a new question.