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garik1379 [7]
3 years ago
6

A hot air balloon is moving at a speed of 10 meters/second in the +x direction. The balloonist throws a brass ball with a veloci

ty of -2 meters/second with respect to himself. If the ball lands after 20 seconds, about how far does it land horizontally from the point at which it was released?
A). 120 m B). 125 m C). 300 m D). 400 m
Mathematics
2 answers:
irakobra [83]3 years ago
5 0

Answer:240 m

Step-by-step explanation:

Given Balloon is going towards positive x direction with a speed of 10 m/s

and balloonist throw the ball with -2 m/s with respect to himself

thus absolute ball velocity is 12 m/s

As there is no horizontal force in x direction thus distance covered by ball in 20 sec is

R=12\times 20=240 m

antiseptic1488 [7]3 years ago
4 0

I think you meant to write 420 m for D. That is the answer.

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Read 2 more answers
Let ? = {a, b, c} be a sample space. let m(a) = 1/2, m(b) = 1/3, and m(c) = 1/6. find the probabilities for all eight subsets of
Leviafan [203]
<span>
A= {a,b,c} . Since this set has 3 elements, the number
of its total subset is 2³ = 8 (including the Ф element):

Here below all the subsets of {a,b,c}, with their related probabilities, knowing that P(a) = 1/2 ; P(b) = 1/3 and P(c) = 1/6

{a}        </span>→→→→1/2
<span>{b}        </span>→→→→1/3
<span>{c}        </span>→→→→1/6
<span>{a,b}     </span>→→→→1/2 + 1/3 =  5/6
<span>{a,c}     </span>→→→→1/2 + 1/6  =  2/3
<span>{b,c}     </span>→→→→1/3 + 1/6  =  1/2
<span>{a,b,c}  </span>→→→→1/2 + 1/3 + 1/6 = 1
<span>{∅}       </span>→→→→0 =0
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