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Ostrovityanka [42]
4 years ago
10

a stone is thrown down off a bridge with a veloctiy of 5.6m/s. What is the velocity afer 3 seconds have passed?

Physics
2 answers:
Flura [38]4 years ago
6 0
I think it's 16.8 because you multiply 5.6x3=16.8
nexus9112 [7]4 years ago
5 0

Answer:

Final speed of the stone, v = 35 m/s

Explanation:

It is given that,

Initial speed of the stone, u = 5.6 m/s

Let v is the velocity of the stone after 3 seconds have passed. It is moving down under the action of gravity. So, using the first equation of motion as :

v=u+at

v=u+gt

v=5.6+9.8\times 3

v = 35 m/s

So, the final speed of the stone is 35 m/s. Hence, this is the required solution.

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anastassius [24]
Momentum (p) = mass × velocity

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What is the mechanical advantage of the level shown below?
snow_lady [41]

the correct answer is B. 1.27

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therefore, in this question, the effort arm is 0.28m while the load arm is 0.22 m. MA is calculated as follows: MA=effort arm/load arm

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3 years ago
If a receiver is overly selective:
VMariaS [17]

Answer:

C) only part of the bandwidth of the AM signal is amplified, causing some of the sideband information to be lost and distortion results.

Explanation:

Selectivity is the ability of a receiver to respond only to a specific signal on a wanted frequency and reject other signals nearby in frequency.

If a receiver is overly selective, only part of the bandwidth of the AM signal is amplified, causing some of the sideband information to be lost and distortion results. Whereas, if a receiver is underselective, the receiver can pick different signals on different frequencies at the same time.

7 0
3 years ago
A 1500 kg truck is acted upon by a force that decreases its speed from 25 m/s to 15 m/s in 8 s. What is the magnitude of the for
Citrus2011 [14]

Answer:

F = 1,875 N

Explanation:

force=

\frac{change \: in \: momentum}{time \: taken}

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where ∆H ----> change in momentum.

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and ∆V ----> change in velocity

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and m ----> is mass

then f =

\frac{1500 \times (25 - 15)}{8}

= 1,875 N

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