afarrand afarrand

10-02-2022
Mathematics

contestada

you throw a rock up into the air as hard as you can. it stays in the air for 8 seconds. what was the velocity of the rock when you threw it?

Respuesta :

zsm2800 zsm2800

11-02-2022

Answer:

39.2 m/s

Step-by-step explanation:

Let a = 9.8 m/s^2, t = 8 sec, find the initial velocity v

After time t, the rock hit the ground, so the height h = 0

Use h = vt - at^2/2 = 0

v = at/2 = 9.8 * 8/2 = 39.2 m/s

Answer Link

Otras preguntas

If (4x-y,x-4y):(3,-3y) then find the value of x and y? please help me!‍

?????????????????????????

why neutron doesn't contain any charge?

Drivers education - Unit 3 The video you just watched puts viewers in many different real-world driving situations and asks them to predict what they might do i

Suppose you invest $130 a month for 6 years into an account earning 7% compounded monthly. After 6 years, you leave the money, without making additional deposit

Least common multiple of 35 and 70

When u ask someone how they been doing and they say “good”, can u say “ oh, that’s good” if not, what do you say back?

I have tried this problem multiple times now and don't get the correct answer. Please help!

Accordding to this functionWhat is:-limf(x) x approches 2⁺

Find the value of x and y using the diagram below.