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3 years ago

14

Which activities demonstrate reaction time the most?

1 answer:

Black_prince [1.1K]3 years ago

7 0

Answer:

A goal keepee catering the ball in time is answer

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An object in equilibrium has a net force of

ioda

If an object is at equilibrium, the net force acting upon the object is 0 Newton.

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3 years ago

Which of the following Illustrates 2 resistors in a series circult? A, B, C, D.

Kaylis [27]

Answer:

It's either B or D, I'm not positive which it is

Explanation:

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2 years ago

HELP!! I’m DESPERATE!! 19 POINTS!!!

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I ready testing? Me too haha I think it’s A!

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3 years ago

In a physics lab experiment, a compressed spring launches a 32 g metal ball at a 35 degree angle compressing the spring 18 cm ca

Free_Kalibri [48]

Ball hits the floor at 1.6 m below the initial position

So here we can say that

$\Delta y = -1.6 m$

also it will hit at horizontal distance of 5.2 m

$\Delta x = 5.2 m$

let say its velocity in x and y directions are given as

$v_x ,v_y$

now we can say

$v_x* t = 5.2$

$-1.6 = v_y * t - \frac{1}{2}gt^2$

from above two equations

$-1.6 = v_y* \frac{5.2}{v_x} - 4.9t^2$

as we know that it is projected at an angle of 35 degree

so we know that

$v_y = v_x tan35$

$-1.6 = 5.2 tan35 - 4.9 t^2$

$4.9 t^2 = 3.64 + 1.6 = 5.24$

$t = 1.03 s$

now we have

$v_x * 1.03 = 5.2$

$v_x = 5.03 m/s$

also we can find vertical component of velocity as

$v_y = v_x tan35 = 3.52 m/s$

now we will find net velocity as

$v^2 = v_x^2 + v_y^2$

$v^2 = 5.03^2 + 3.52^2$

$v = 6.14 m/s$

now by energy conservation we can say

$\frac{1}{2}kx^2 = \frac{1}{2}mv^2$

$k*(0.18)^2= 0.032*(6.14)^2$

$k = 37.2 N/m$

so spring constant is 37.2 N/m

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3 years ago

A person is attracted toward the centerof the earth by a 500 n gravitational force. the force with which the earth is attracted

nignag [31]

500 N is the answer, you just tell that the moon is attracted towards the person because of the Earth's huge mass.

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3 years ago