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Mkey [24]
1 year ago
8

A body of mass 80kg moving with a velocity of 6m/s hits a stationary body

Physics
1 answer:
Sauron [17]1 year ago
8 0

Answer:

4 m/s

Explanation:

Conservation of momentum ,  mv

Before collision  80 kg * 6 m/s  = 480  kg-m/s  

   after the collision,

         the momentum is the same but the mass is 80+40 kg =120 kg

 mv = 480

120 * v = 480

v = 4 m/s

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How much heat must be added to make a 5g substance with a specific heat of 2 J/gC that has its temperature go up 10 degrees? Q =
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Answer:

100 Joule

Explanation:

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coming back to problem

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3 years ago
What is the slope of (0,0)(4,200)
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Answer:

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Read 2 more answers
Define moment of momentum. at which condition is it's magnitude zero?​
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Let's start with the concept of momentum. What is it? Linear momentum in physics is mathematically written as a product of mass and velocity of an object. Now let us suppose a body of mass m is moving in an inertial frame of reference with velocity v. Consider the fact that no external force is acting on the system. The momentum of this body is given by mv, where m is the mass and v is its velocity. In case of simple real world problems not delving into the realms of relativity, mass is a conserved quantity and it cannot be zero. Hence the velocity of the body must be zero and hence the momentum.

However, photons are considered to have a rest mass zero.

However note the point carefully "rest mass". A body in motion cannot have mass to be zero.

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7 0
3 years ago
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