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Irina18 [472]
3 years ago
9

Blythe and Geoff are ice-skating together. Blythe has a mass of 40 kg and Geoff has a mass of 79 kg. Blythe pushes Geoff in the

chest when both are at rest, causing him to move away at a speed of 5 m/s.

Physics
2 answers:
alexandr1967 [171]3 years ago
6 0

Answer:

Speed of Blythe is 9.8 m/s.

Explanation:

Mass of Blythe =40 kg

Mass of Geoff = 79 kg

Speed = 5 m/s

Suppose, we determine the Blythe's speed after she pushes Geoff

Since, initial momentum is zero final momentum should be zero.

Using momentum of conservation

m_{B}v_{B}+m_{G}v_{G}=0

v_{B}=-\dfrac{m_{G}v_{G}}{m_{B}}

Put the value into the formula

v_{B}=-\dfrac{79\times5}{40}

v_{B}=-9.8\ m/s

Negative sign shows that he move in direction opposite to Geoff.

Hence, Speed of Blythe is 9.8 m/s.

Deffense [45]3 years ago
4 0
9.9 m/s

calculations below 

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The time taken for the light to travel from the camera to someone standing 7 m away is 2.33×10¯⁸ s

Speed is simply defined as the distance travelled per unit time. Mathematically, it is expressed as:

<h3>Speed = distance / time </h3>

With the above formula, we can obtain the time taken for the light to travel from the camera to someone standing 7 m away. This can be obtained as follow:

Distance = 7 m

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<h3>Time = 2.33×10¯⁸ s</h3>

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2 years ago
There is a seasaw that's holding two men. The seesaw has a length of 18m that can pivot from a point at its center. Man 1 has a
Alex

Answer:

Distance=  2.3864m

Explanation:

So that the balance is in equilibrium parallel to the floor, we must match the moment each man makes with respect to the pivot point.

In many cases the point of application of force does not coincide with the point of application in the body. In this case the force acts on the object and its structure at a certain distance, by means of an element that transfers that action of this force to the object.

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Mathematically it is calculated by expression:

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