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padilas [110]
3 years ago
11

The higher the objects " ? ", the more kinetic energy

Physics
2 answers:
DanielleElmas [232]3 years ago
8 0
ANSWER: friction


STEP BY STEP EXPLANATION:
natita [175]3 years ago
7 0

Answer:

yes

Explanation:

can i get brainlest pls

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Carlos uses a rope to pull his car 30 m to a parking lot because it ran out of gas. If Carlos exerts 2,000 N of force to pull th
Mariulka [41]

Answer:

Explanation:

Remark

The only thing that might trip you up is what to do with the angle. The vertical component of the 15 degrees does no work against anything. So the 15 degrees limits the horizontal force.

The formula is

Work = F * d * cos(15)

The givens are

F = 2000 N

d = 30 m

Cos(15) = 0.9659

Solution

Work = 2000 * 30 * cos(15)

Work = 57,955

Rounded to two places would be 5.8 * 10^4

C

4 0
3 years ago
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Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Given that the speed of sound is 340 m/s, approximatel
Zinaida [17]

Answer:3.0hertz

Explanation:

7 0
3 years ago
A mother has four times the mass of her young son. Both are running with the same kinetic energy. Part A What is the ratio vs/vm
valentinak56 [21]

Answer: 2:1

Explanation:

Given

Mother has four times the mass of young son

If they possess same kinetic energy then K_m=K_s

\Rightarrow K_m=\dfrac{1}{2}\times m_m\times v^2_m

\Rightarrow K_s=\dfrac{1}{2}\times m_s\times v^2_s

Equate the energy

\Rightarrow \dfrac{1}{2}\times m_m\times v^2_m=\dfrac{1}{2}\times m_s\times v^2_s\\\\\Rightarrow \dfrac{1}{2}\times 4m_s\times v^2_m=\dfrac{1}{2}\times m_s\times v^2_s\\\\\Rightarrow 4 v^2_m=v^2_s\\\\\Rightarrow \dfrac{v_s}{v_m}=\sqrt{4}\\\\\Rightarrow \dfrac{v_s}{v_m}=2

Thus, the ratio of speed is 2:1.

7 0
3 years ago
What is drag? In what situations might it act on the force of gravity?
stepan [7]
Drag is passive, therefore it does not act on gravity. Drag is a mechanical resistance to motion. If the motion in question was induced by gravity drag it can impede that motion, but has no effect on the gravity. 

hope this helps!
7 0
3 years ago
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The electron drift speed in a metal wire is exceedingly slow. Yet, when you turnon the light switch the light begins to illumina
elixir [45]

Explanation:

The misunderstanding here is that the thing that turns on the light bulb is not the same electrons near the light switch. So, the electrons near the switch is not moving all the way across the circuit instantly. The electrons are distributed across the wire. When the light switch is turned on, the circuit is connected and there is a potential difference between the bulb and the source. This potential difference creates an electric field, and free electrons move under the influence of this electric field according to Coulomb's Law. When they start to move the electrons closest to the bulb causes the bulb to glow.

So, the important factor here is not the drift velocity of the electrons but the number of electrons and the strength of the electric field.

6 0
3 years ago
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