# Physical Science

Hi... well anyways so I am in 7th grade but I'm taking 8th grade science...I think...I know for sure that I am in Accelerated 7th grade science so if that helps at all, there you go:)

Back to the subject I'm really confused with acceleration calculation and velocity, time, speed, distance, etc.

I have a quiz on it tommorow and a test on thursday, so if anyone could help that would be fantastic! Oh and I also have this really hard worksheet that is getting graded and I certinly will FAILLLLL! :(

1. 👍 0
2. 👎 0
3. 👁 224
1. You have not asked a question. That is probabkly why no one has responded thus far. If you wish, send us a few specific questions from your worksheet that are giving you trouble.

Velocity is the rate of change of location and accleration is the rate of change of velocity.

Time is what it is.

1. 👍 0
2. 👎 0
posted by drwls
2. i'll try my best to explain them as simple as possible.
(i) distance - how far an object has moved. it is in units of length (meters, kilometers, etc)

(ii) speed - distance traveled over certain time, or in formula,
v = d/t
where
v = speed
d = distance
t = time
it has units of length/time. for example m/s, km/h, etc.

(iii) velocity - displacement over time. it is almost the same with speed except that speed is scalar (or does NOT indicate the direction), while velocity is vector (or it indicates the direction).

(iv) acceleration - change in velocity over time, or in formula,
a = (v2 - v1)/t
where
a = acceleration
v2 = final velocity
v1 = initial velocity
t = time elapsed
it has the units of length/time^2. for example, m/s^2.note that if in the problem it is stated that the velocity is constant, acceleration is zero.

note that the formula to use to calculate these quantities still depend on the problem. some of the formulas here are for objects in 'Uniform Motion' (a = 0, thus v = constant) and can not be used for objects in 'Uniformly Accelerated Motion' (a = constant and not equal to 0)

hope this helps~ :)

1. 👍 0
2. 👎 0
posted by Jai
3. Place the following words into the illustration below: gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related.
Circular diagram including five arrows pointing clockwise: top arrow points to spores; next arrow points from spores to a blank labeled 1.; next arrow points from 1. To a blank labeled 2., (egg and sperm) underneath the blank; next arrow points from 2. to blank labeled 3, next arrow points from 3. to blank labeled 4. (5 points)

1. 👍 0
2. 👎 0
posted by blah
4. What are the branches of Physical Education

1. 👍 0
2. 👎 0
5. LOLLIPOPS!!!!!!!!!!!!

1. 👍 0
2. 👎 0
6. It's basically gym

1. 👍 0
2. 👎 0

## Similar Questions

1. ### what can i compare middle school to?

what can i compare middle school to? (use in metaphor), based on 6th, 7th, and 8th grade. for example playing monopoly 6th grade - buying properties, 7th grade- adjusting to the game, 8th grade - stress over money

asked by NEEDSHELP(: on May 16, 2010
2. ### english

- Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st Grade - 2nd Grade - 3rd Grade -

asked by peter on January 8, 2010
3. ### science

i am in 7th grade accelerated science, so i am learing 8th grade material. I am having some difficulties with covelant and ionic bonds. My lab is due tomorrow and i have a quiz on Wed. If anyone can help me understand this better

asked by Michele on January 4, 2010
4. ### Math

How many 7th grade students are expected to move by the end of the year? If 12 students actually moved, did more or fewer 7th-grade students move than expected? Justify your answer. 6th-grade # of students: 250 % moves: 2%

asked by Sid on March 8, 2016
5. ### Math

Theo made the table below to show the number of middle school students who attented the last football game. if this data were displayed in a circle graph, how many degrees would be in the sector representing the 8th grade Grades

asked by Ann on March 16, 2015
6. ### Math

At Jefferson School, both 6th grade & 7th grade classes take a math test. The average score for the 6th grade is 80 and for the 7th grade is 90. If there are twice as many students, in the 7th grade as there is in the 6th grade,

asked by Sidney on January 14, 2016
7. ### Biochem

asked by Pop on November 13, 2014
8. ### Math (trigonometry)

MONDAY  December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade

asked by Sammy on December 3, 2012
9. ### english

I'm a 8th grade student and i need to write a Proffesional Business letter to My 7th grade english Teacher can you help?

asked by Abigail on October 22, 2010