3 years ago

Helppppp please rn

Physics

2 answers:

algol133 years ago

4 0

Answer:

Explanation:this is not physics

Rainbow [258]3 years ago

4 0

Answer:

Explanation:

it's just a thought plus everything else is either a question or a fact

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Alika [10]

Answer:

Explanation:

Because it has to increase

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3 years ago

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An object initially at rest experiences an acceleration of 9.8m/s2. How much time will it take it to achieve a velocity of 49m/s

Vlad1618 [11]

Answer:5seconds

Explanation:

initial velocity(u)=0

Final velocity(v)=49m/s

acceleration(a)=9.8m/s2

Time(t)=?

V=u+axt

49=0+9.8xt

49=9.8t

t=49/9.8

t=5seconds

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3 years ago

a weather balloon slowly expands as energy is transferred as heat from the outside air. if the average net pressure is 1.5×10^5m

Alexxx [7]

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4 years ago

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A child and sled with a combined mass of 58.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed o

erma4kov [3.2K]

Answer:

The height is $h = 0.5224 \ m$

Explanation:

From the question we are told that

The combined mass of the child and the sled is $m = 58.0 \ kg$

The speed of the sled is $u = 3.20 \ m/s$

Generally applying SOHCAHTOA on the slope which the combined mass is down from

Here the length of the slope(L) where the combined mass slides through is the hypotenuses

while the height(h) of the height of the slope is the opposite

Hence from SOHCAHTOA

$sin (\theta) = \frac{h}{L}$

=> $Lsin(\theta) = h$

Generally from the kinematic equation we have that

$v^2 = u^2 + 2aL$

Here the u is the initial velocity of the combined mass which is zero since it started from rest

and a is the acceleration of the combined mass which is mathematically evaluated as

$a = g * sin (\theta )$

$v^2 = u^2 + 2 * g * sin (\theta )L$

=> $2Lsin(\theta ) = \frac{v^2 - u^2 }{g}$

=> $h = \frac{ v^2 - u^2}{2g}$

=> $h = \frac{ 3.20^2 - 0^2}{2 * 9.8 }$

=> $h = 0.5224 \ m$

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3 years ago

You lift your pet cat vertically by 2m and then you lower it vertically by 2m .during this exercise is the total work done by gr

rosijanka [135]

Zero, cause the positive and negative work cancel out :)

8 0

3 years ago

Helppppp please rn ​

Helppppp please rn