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guajiro [1.7K]
3 years ago
15

As you walk into the kitchen, what forces act on you while you are walking? [Hint: there are more than two forces.]

Physics
1 answer:
Setler [38]3 years ago
3 0
Draw a square that is meant to represent you, draw an up arrow, a down arrow, a right arrow, and a left arrow. The Left arrow is FORCE FRICTION which is the floor adding friction against you, the Right arrow is FORCE APPLIED, which is the force that your legs are using to cause you to move, the Up arrow is FORCE NORMAL, which is the force that always act on something that is affected by gravity, and the Down arrow is FORCE GRAVITY. These are the four forces acting on you as you walk to the kitchen
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Two stones, one with twice the mass of the other, are thrown straight up and rise to the same height h. Compare their changes in
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<h2>The gravitational potential energy is double for stone with twice the mass of other stone.</h2>

Explanation:

Let mass of stone 1 be m.

Mass of stone 2 is twice the mass of stone 1.

Mass of stone 2 = 2m

We know that

  Gravitational potential energy = Mass x acceleration due to gravity x Height

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For stone 1 ,

                PE₁ = mgh

For stone 2 ,

                PE₂ = 2mgh = 2 PE₁

So the gravitational potential energy is double for stone with twice the mass of other stone.

               

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3 years ago
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4 years ago
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Murljashka [212]
Total momentum must be conserved since there are no external forces in the horizontal direction on the skateboarder or the skateboard.

Momentum before the jump:
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Momentum after the jump:
P =  m_1v_1 + m_2v_2 = (1.8kg)(v_1) + (42kg)(0.3 \frac{m}{s} ) = 0

Solving for the velocity v:
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