rLeylmarjulia rLeylmarjulia

12-12-2016
Mathematics

contestada

What speed must you toss a ball straight up so that it takes 4 s to return to you? Show your work.

Respuesta :

Edufirst Edufirst

13-12-2016

1) Type of motion: constant acceleration.

2) acceleration, a = 9.8 m/s^2

3) time up = time down = 4seconds / 2 = 2 seconds

4) formula = Vf = Vo - a*t^2/2

Vf = 0 => Vo = a*t^2 / 2 = 9.8m/s^2 * (2 s)^2 / 2 = 19.6 m/s

Answer: 19.6 m/s

Answer Link

Otras preguntas

What point would A' be after a dilation with a scale factor of 2 centered at (-7,-2)?

A large chandelier is given a push and allowed to swing. It is hanging from a cable that is 2.8 meters long. The chandelier weighs 184 kg. How long does it take

3] The population of avillage is 4800. There are1200 men, 1620 women480 boys and the rest aregirls.(a) How many girls arein the village?(b) Calculate thepercent

4432 buttons are made in three hours it takes 6 hours to make enough buttons to fill three boxes. When box B has been filled there are 3363 buttons remaining bo

Each question on a multiple-choice exam has four choices. One of the choices is the correct answer, worth 5 points, another choice is wrong but still carries pa

A child in a boat throws a 4.5kg package out horizontally with a speed of 13 m/s. Calculate the velocity of the boat immediately after, assuming it was initiall

Identify the key stakeholder groups and their specific expectations of the organization with reference to corporate social responsibility (CSR) and describe how

What is the value ofx?

Which of the following shows a function written in equation notion that is equivalent to the function below? f(x) = 3x+10 A) y = 3f(x)-10B) y = 3x+10C) y = 3(x

Name a work (book or article) associated with either Dr. Ornish or Dr. Campbell. It can be an article that was written about either author. Include a quote from