Biology, 17.07.2019 09:00 yasarhan2

Abox slides down an inclined plane with a uniform acceleration and attains a velocity of 27 m/s in 3 seconds from rest. find the final velocity and distance moves in 6 seconds (initially at rest)

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Answer from: dezmondpowell

In the given case, the final velocity after 6s is 54 m/s, and the distance covered by the object in 6s = 162m

Final velocity

To find out the final velocity and distance in 6 seconds first we need to find out the acceleration of the object

Given

initial velocity, u = 0 m/s

final velocity, v = 27 m/s

Time, t = 3 sec

Solution

Using the equation of motion

v=u+at

Putting the values:-

$27= 0+a \times 3\\a=\frac{27}{3}\\= 9\ m/s^2$

So the acceleration of the object is $9\ m/s^2$

Now for

t = 6 sec

Using the equation of motion

v=u+at

And using the value of acceleration a = $9\ m/s^2$

$v=0+9\times6\\= 54\ m/s$

Now to calculate the distance covered in 6 sec, using the equation of motion

$v^2 -u^2= 2\times a \times s$

Putting the values

$54^2 -0^2 =2\times 9\times s\\2916=18\times s\\s=\frac{2916}{18} \\=162\ m$

So, the final velocity after 6s is 54 m/s, and the distance covered by the object in 6s = 162m

Learn more about final velocity:

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Answer from: keyonnaallen2004

The box attains a velocity of 27 m/s in 3 seconds from rest. That means the velocity become 27m/s from 0m/s. Then, the acceleration would be:

acceleration= final velocity - initial velocity / time
acceleration= (27m/s- 0m/s) / 3second= 9m/s2

The final velocity if the time is 6 second would be:
acceleration= final velocity - initial velocity / time
9m/s2= (final velocity - 0m/s) / 6s
final velocity= 9m/s2 * 6s= 54m/s

The distance would be:
distance= (final velocity + initial velocity) * time / 2
distance= (54m/s+ 0m/s) * 6s/ 2 = 162m

Answer from: Quest

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Answer from: Quest

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

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Abox slides down an inclined plane with a uniform acceleration and attains a velocity of 27 m/s in 3...

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