Question

A car traveling at 60 km/h will skid 30 m when its brakes are locked. If the same car is traveling at 180 km/h, what will be its skidding distance? Show your work

Answer 1

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Answer 2

You sit at the outer rim of a Ferris wheel that rotates at 2 revolutions per minute (RPM). What would your rotational speed be if you were instead clinging to a position halfway from the center to the outer rim?

Answer 3

thanks

Answer 4

At the outer edge of a rotating space habitat, 130 m from its center, the rotational acceleration is g. What is the rotational acceleration at a distance of 65 m from the center of the habitat?

Answer 5

It would be easier to tutor you if you explained what about the question is giving you trouble.

Answer 6

Let's begin with ur first question

Answer 7

okay the problem is I just don't know how to do it. Id appreciate if you explained

Answer 8

Do you know the equation of motions ?

Answer 9

V\(^2\) = U\(^2\) + 2aS ?

Answer 10

no I dont

Answer 11

ohkay, in that formula V=final speed, U=initial speed, a= accelaration and S=distance covered

Answer 12

In first case,
initial speed = 60km/hr
Final speed = 0km/hr
Distance covered = 0.03km

Answer 13

got it ?

Answer 14

yes

Answer 15

Now substitute the values and find the missing value of accelaration

Answer 16

Okay, (0)^2 = (60)^2 + 2a(0.03)

Answer 17

yes so a = ?

Answer 18

180?

Answer 19

a= (-60*60)/0.06

Answer 20

i.e 60000

Answer 21

Now for the next case simply plug in the given values
U=180km/hr
V=0
a=60000
and then find S. This will be the answer

Answer 22

0 = 180 + 2(60000)(0.03)s right?

Answer 23

yes, find out s

Answer 24

0=180+2(1800)s
0=180+3600s
0=3780s
s=0?

Answer 25

a=-60000
u have to put u\(^2\) and not just u, so put (180)\(^2\)

Answer 26

and why r u putting 0.03 in this case ?

Answer 27

That was the distance travelled in first case

Answer 28

0=32400+ 2(-60000)s? I thought I had to put that I got confused

Answer 29

Here,
0\(^2\) = 180\(^2\) + 2*60000*S

Answer 30

*-60000

Answer 31

So,
120000*S = 180 * 180

Answer 32

S= 32400/120000

Answer 33

and this will give S= 270 m

Answer 34

oh okay I get it now I was just confused of why the 0.03 was there.

Answer 35

30m = 0.03 Km

Answer 36

It is the distance travelled in first case. got it ?

Answer 37

yes I got it thanks :)

Answer 38

could you also help with the other two questions?

Answer 39

Close this one first and post them as new one !

Answer 40

Multiple questions in one thread is not allowed

Answer 41

Did you know you can give medals to people who help you with questions? Just click the \(\color{blue}{\text{blue "best response" button}}\) to show appreciation for the people who help you.

Answer 42

oh okay ill do that and oh okay ya ill give you a medal.

Answer 43

No i'm not asking to give me a medal !
It's ur choice. I am only making u aware of this since u look new to the site

Answer 44

U should not give it to me if u think u r still unsatisfied

Answer 45

Am satisfied :)