Physics

Hello, I had a question for physics, and I tried it out, however, I got the wrong answer.
The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity.

My Work : The formula- d=vi*t+1/2*a*t^2
The isolated formula-(2*d)/(t*a)=vi

So it would be (2*4.80m)/(0.750s*9.81m/s^2)=vi
1.30m/s=vi

You you please show me where I went wrong? Thank you!

1. 👍
2. 👎
3. 👁

your formula is incorrect the right formula is as defined

[Formula used]

d=(ViT)+(1/2at^2)

vi=(0.75/4.8)+(1/2*9.8*0.75^2)

1. 👍
2. 👎

your formula is incorrect the right formula is as defined

[Formula used]

d=(ViT)+(1/2at^2)

vi=(0.75/4.8)+(1/2*9.8*0.75^2)

1. 👍
2. 👎

Similar Questions

1. math

A school has 63 students studying Physics, Chemistry and Biology. 33 study Physics, 25 Chemistry and 26 Biology. 10 study Physics and Chemistry, 9 study Biology and Chemistry while 8 study both Physics and Biology. Equal numbers

2. Mathematics

In a class,30 offer Biology,21 offer Chemistry and 22 offer Physics.15 offer Physics and Biology,10 offer Physics and Chemistry and 13 offer Biology and Chemistry.2 offer Physics only,3 offer Chemistry only and 7 offer Biology

3. Mathematics

In a class of 100 students,37 study maths,32 study physics 31 study chemistry,9 study maths and physics 12 study maths and chemistry,11 study physics and chemistry,28 study none of these. Illustrate the information in a Venn

4. Math

In a class of 156 students who took maths and physics they all passed at leat 1 subject 75 pass math and physics.if twice has passed physics find how many students pass math only. Represent in Venn diagram.

1. Math

In a class of 100 students, 40 offer Biology and 10 offer Chemistry and Biology .10 offer Physics and Chemistry , and 30 offer Physic and Biology . Each student offer at least one of the three subjects. The number of students who

2. maths

A survey o 85 students asked them about the subjects they liked to study 35 students liked maths,37liked history,26 liked physics,20 liked maths and history,14 liked maths and physics,2 liked all the subjects. a) how many of these

3. Multiple Choice

Physics 2. Which of the following is equivalent to one ampere? (Points : 1) 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s Question 3.3. A stream of moving charges results in a current of 5.6 A. How long does 116 C of charge take to

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of

1. As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the

2. Mathematics

In a class of 40 students,30 takes agric science and 20 takes physics.If 8 takes neither agric nor physics.How many offers agric and not physics

3. Physics

I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling