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Sonbull [250]
3 years ago
8

A plane takes 4 hrs to fly 4200 km. What was the plane's velocity in km/hr?

Physics
1 answer:
poizon [28]3 years ago
3 0

velocity =  distance / time

            =  4200 km / 4 hr

              1050 km / hr

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Momentum = (mass) x (velocity)

Original momentum before the hit =

                   (0.16 kg) x (38 m/s) this way <==

               =             6.08 kg-m/s  this way <==

Momentum after the hit =

                   (0.16) x (44 m/s) that way  ==>

               =           7.04 kg-m/s  that way ==>

Change in momentum = (6.08 + 7.04) =  13.12 kg-m/s  that way ==> .
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Change in momentum = impulse.

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                          13.12 kg-m/s  = (force) x (0.002 sec)

  (13.12 kg-m/s) / (0.002 sec)  =  Force

             6,560 kg-m/s² = 6,560 Newtons  =  Force   

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8 0
3 years ago
A feather is dropped on the moon from the height of 1.4m. The acceleration of gravity on the moon is 1.67ms-1. Determine the tim
Zinaida [17]

1.3s

Explanation:

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Height = 1.4m

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To solve this problem, we are going to use one of the motion equation that relates time, gravity and height.

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Sine the body was dropped from rest, initial velocity is zero;

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learn more:

Gravity brainly.com/question/10934170

#learnwithBrainly

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3 years ago
V
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Resolving vectors question. See diagram enclosed.

4 0
3 years ago
A disk is uniformly accelerated from rest with angular acceleration α. The magnitude of the linear acceleration of a point on th
solniwko [45]

Answer:

a = R\alpha\sqrt{1 + \alpha^2t^4}

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so we have

a = \sqrt{R^2\alpha^2 + R^2(\alpha t)^4}

a = R\alpha\sqrt{1 + \alpha^2t^4}

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Hope this shows! It has all the equations for all of the problems u asked in the comments 

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