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DaniilM [7]
2 years ago
9

The net force on the propeller of a 3.2 kg model airplane is 7.0N forward. What is the acceleration of the airplane? If it start

s from rest, what is the velocity of the plane after 2.5 seconds?
Physics
1 answer:
Korolek [52]2 years ago
6 0

Answers:

Acceleration = 2.1875 m/s^2

Velocity after 2.5 seconds = 5.46875 m/s

=======================================================

Work Shown:

Part 1

The mass is m = 3.2 and the force is F = 7.0

Apply the formula F = ma to find the acceleration to be...

F = ma

7.0 = 3.2*a

7.0/3.2 = a

2.1875 = a

a = 2.1875

The acceleration is 2.1875 m/s^2

Every second, the velocity of the plane is increasing by 2.1875 m/s.

----------------------

Part 2

We have the following variables

  • vi = initial velocity = 0 m/s (since it starts from rest)
  • vf = unknown final velocity (what we're trying to figure out)
  • t = change in time = 2.5 seconds
  • a = acceleration = 2.1875 m/s^2

Using one of the kinematics equations, we can then say,

vf = vi + a*t

vf = 0 + 2.1875*2.5

vf = 5.46875

After 2.5 seconds, the airplane is traveling 5.46875 m/s.

5.46875 m/s converts to roughly 12.2332 mph.

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If a participant were holding two different weights in their hands and the jnd for a 10-gram weight was 1 gram, what should the
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The jnd for a 100-gram weight, according to Weber's law will be 10 gram.

<h3>What is Weber's law?</h3>

It should be noted that Weber's law asserts that the nature of any given stimulus will always affect how change is perceived. In other words, the size, weight, importance, etc. of the prior situation and the significance of the change both influence whether a change will be observed.

In this case, it was given that the jnd for a 10-gram weight was 1 gram, therefore, the jnd for 100 gram will be;

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Therefore, jnd for a 100-gram weight, according to Weber's law will be 10 grams.

Learn more about weight on:

brainly.com/question/19753744

#SPJ1

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Any help would be great! Thank you x<br><br><br> Giving brainliest answer xoxo
garri49 [273]

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A vacuum would have been created. I hope this helps have a great day

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