Physics

A stone that starts at rest is in free fall for 8.0 s.

a.Calculate the stone's velocity after 8.0 s.

b. What is the stone's displacement during this time?

Given:
t = 8.0 s
a = 9.81 m/s^2

For a, in order to calculate the velocity, should i use d = vit + 1/2 at^2 and only use the 1/2 at^2.

For b, should i use the d = vit + 1/2at^2 to calculate the distance.

Thanks I appreciate this a lot

  1. 👍
  2. 👎
  3. 👁
  1. v = Vo + a t
    v = 0 + 9.81 (8)

    d = Vo t + (1/2)(9.81)(64)
    = 0 +4.9(64)

    so yes, you have the right idea.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.93 m/s. The stone subsequently falls to the ground, which is 17.1 m below the point where the stone leaves your hand. At

  2. physics

    Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time. What was the initial

  3. Physics

    A stone is projected vertically upwards with a velocity of 20m/s. 2s later another stone is similarly projecte? with the same velocity. when the two stones meet the second one is rising at a velocity of 10m/s.neglecting air

  4. physics

    A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 3.24 s after the stone is dropped. How deep is the hole?

  1. PHYSICS

    A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the

  2. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.65 m/s. The stone subsequently falls to the ground, which is 11.1 m below the point where the stone leaves your hand. At

  3. physics

    While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to

  4. Physics

    A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector

  1. physics

    a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet

  2. physics

    A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, as shown in the figure (see the figure ). The pulley is a uniform disk with mass 10.4 and radius 51.0 and turns on frictionless

  3. Physics 20

    dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once

  4. physics

    A stone is dropped from rest at the top of a mine shaft. It takes 58 s for a stone to fall to the bottom of a mine shaft. How deep is the shaft? The acceleration of gravity is 9.8 m/s2 .

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