2 years ago

What is a vector quantity?

1 answer:

7 0

Answer:

A quantity that has magnitude and direction. It's usually represented by an arrow whose direction is the same direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude

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How does Newton's second law apply to an "Egg Drop" experiment?

Black_prince [1.1K]

Because an object in rest stays in rest until an unequal force pushes it so gravity is pushing on the egg making it drop

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3 years ago

Should a flat grassland or a hillside have deeper soil? Explain your answer.

Fudgin [204]

A hillside of course my friend

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2 years ago

What is the displacement of the armadillo between 0s and 24s ?

Ann [662]

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2 years ago

A 45.0-kg girl is standing on a 168-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat,

muminat

Answer:

The speed of the plank relative to the ice is:

$v_{p}=-0.33\: m/s$

Explanation:

Here we can use momentum conservation. Do not forget it is relative to the ice.

$m_{g}v_{g}+m_{p}v_{p}=0$ (1)

Where:

m(g) is the mass of the girl
m(p) is the mass of the plank
v(g) is the speed of the girl
v(p) is the speed of the plank

Now, as we have relative velocities, we have:

$v_{g/b}=v_{g}-v_{p}=1.55 \: m/s$ (2)

v(g/b) is the speed of the girl relative to the plank

Solving the system of equations (1) and (2)

$45v_{g}+168v_{p}=0$

$v_{g}-v_{p}=1.55$

$v_{p}=-0.33\: m/s$

I hope it helps you!

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2 years ago

Can a body having larger mass be hotter than another of smaller mass.expalain

Rom4ik [11]

Answer:

it would make sense because a larger body could produce more body heat.

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2 years ago

What is a vector quantity?​

What is a vector quantity?