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PolarNik [594]
3 years ago
15

What is the average acceleration of a southbound train that slows down from 15 m/s to 8.6 m/s in 1.2 s?

Mathematics
1 answer:
horrorfan [7]3 years ago
5 0

Answer:

The average acceleration of train is 5.34\ m/s^2

Step-by-step explanation:

We have,

A train that slows down from 15 m/s to 8.6 m/s in 1.2 s. It means that 15 m/s is its initial velocity and 8.6 m/s is its final velocity.

It is required to find the average acceleration of the train.

a=\dfrac{v-u}{t}\\\\a=\dfrac{(8.6-15)\ m/s}{1.2\ s}\\\\a=-5.34\ m/s^2

The average acceleration of train is 5.34\ m/s^2.  Negative signs shows that the train is decelerating.

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Alan, Bill, and Calvin are playing a game with collectible cards. At the moment, Alan has 11 less than 2.5 times the number of c
oksian1 [2.3K]

Answer:

50

Step-by-step explanation:

I'm sorry but your missing the questions but I found a close answer! Let A be the number of cards Alan has B be the number of cards Bill has C be the number of cards Calvin has Alan had 11 less than 2 1/2 times the number of cards bill has. is 2.5 Alan is 2.5 of bill has minus 11 A=2.5B -11 Calvin has 1 more than 1 1/2 times the number of cards bill has. is 1.5 Calvin is 1.5 of bill has plus 1 C=1.5B + 1 Alan and Calvin have the same number of cards So A=C WE plug in A  and C equations and solve for B 2.5B -11 = 1.5B + 1 (subtract 1.5B on both sides) 1B -11 = 1 (Add 11 on both sides) B = 12 If Alan and Calvin have the same number of cards, the number bill has is 12 The number of cards Alan and Calvin each have is 19 Total cards = 12 + 19 + 19 = 50 If Alan, bill, and Calvin have all the cards in the deck then the deck has 50 cards.

3 0
2 years ago
Samuel wants to deposit $4,000 and keep that money in the bank without deposits or
Hoochie [10]

Answer:

First option pays $480.60 in interest and the second option pays $442.84 in interest

Step-by-step explanation:

P(1+r/n)^rt is for compound interest and Pe^rt is for continuous interest

5 0
3 years ago
Solve the following equation:<br> 1-31 x 8 = x<br> X =
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Answer:

The square root of a negative number is not a real number

=

−

9

8

8

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Need help on this...................
sleet_krkn [62]
You would use the bottom right box :)
7 0
3 years ago
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Penny's garden has alength of 16ft. and the width is 5 ft. with a rectangular fountain in the middle that measures 5 ft by 9 ft.
lilavasa [31]

First we need the whole garden:

16 x 5 = 80

Now we need to fountain:

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Now to find our answer:

80 - 45 = 35

So our answer is B. 35ft²

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