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bearhunter [10]

3 years ago

13

Newton first law of motion

2 answers:

Kaylis [27]3 years ago

6 0

Answer:

His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... The amount of the change in velocity is determined by Newton's second law of motion.

tiny-mole [99]3 years ago

3 0

Answer:

It state that every body will remain at same condition (rest or motion) till external force acts on it ♥️

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Select which geologic events will have an immediate impact on the landscape. Choose three (3).

alexgriva [62]

Answer: A, B, and D,

C is incorrect because continental drift takes several centuries to move the tectonic plates witch is not an immediate impact leaving you with A,B, and D.

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3 years ago

An object of unknown mass is initially at rest and dropped from a height h. It reaches the ground with a velocity v1 . The same

Hatshy [7]

Answer:

$v_2=\sqrt{2}v_1$

Explanation:

The velocity v₁ can be calculated with the kinematic formula:

$v_1^{2} =v_0^{2} +2gh$

Since the object is initially at rest, v₁ becomes:

$v_1=\sqrt{2gh}$

Where g is the acceleration due to gravity. Now, the velocity v₂ can be calculated with the same formula, but now the initial velocity is v₁:

$v_2^{2}=v_1^{2} +2gh$

Substituting v₁ in this expression and solving for v₂, we get:

$v_2^{2}=(\sqrt{2gh} )^{2} +2gh=4gh\\\\\implies v_2=\sqrt{4gh}=2\sqrt{gh}$

Now, dividing v₂ over v₁, we get the expression:

$\frac{v_2}{v_1}=\frac{2\sqrt{gh} }{\sqrt{2gh}}=\sqrt{2}\\ \\\implies v_2=\sqrt{2}v_1$

It means that v₂ is √2 times v₁.

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4 years ago

What is the speed of electron having the same kinetic energy with photon speed 0.006c?

Blababa [14]

Answer:

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3 years ago

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3 years ago

Read 2 more answers

Select the correct answer.

denis-greek [22]

Answer:

D) 100 kilometres/hour.

Explanation :

<u>Given</u><u> </u><u>-</u>

Displacement = 200 km
Time taken = 2 hrs.

<u>To find</u><u> </u><u>-</u>

Average velocity of the car.

<u>Solu</u><u>tion</u><u> </u><u>-</u>

★ Velocity = displacement/time

→ V = 200/2

→ v = 100 km/h

<u>There</u><u>fore</u><u>,</u><u> </u><u>the</u><u> </u><u>average</u><u> </u><u>veloci</u><u>ty</u><u> </u><u>of</u><u> </u><u>the</u><u> </u><u>car</u><u> </u><u>is</u><u> </u><u>1</u><u>0</u><u>0</u><u> </u><u>km</u><u>/</u><u>h</u><u>.</u>

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3 years ago