WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER (AFTER THE FULL TEST)

Physics

1 answer:

postnew [5]3 years ago

5 0

B you will see the objective outside the vehicle not moving will’l you are moveing inside the vehicle

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Kelly sits on a rock. Her weight is an action force. What is the reaction force?

Dmitrij [34]

The force ffrom the ground that holds the rock up and prevents her from falling through the gound, unless the ground breaks.

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4 years ago

If an object has a large momentum, how easy is it to stop, and why?

podryga [215]

It is dificult to stop an object with a lot of momentum becuase of inertia with means that a moving object will want to keep moving and a stationary object wil want to stay stationary and the larger the momentum of the moving object the harder it will be to stop

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3 years ago

Satellite A is orbiting Earth at an altitude of 500 km and Satellite B is orbiting 800 km above the surface . How does the veloc

sp2606 [1]

The velocity of Satellite A is 2% greater than velocity of satellite B.

The given parameters;

Altitude of Satellite A = 500 km
Altitude of Satellite B = 800 km

The forces acting on the Satellites are given as follows;

$F_c = \frac{mv^2}{r} \\\\F_g = \frac{GMm}{r^2} \\\\\frac{v^2}{r} = \frac{GM}{r^2}\\\\v^2 = \frac{GM}{r} \\\\v^2 r = GM\\\\v_1^2 r _1 = v_2^2 r_2\\\\v_A^2r_A = v_B^2 r_B\\\\(\frac{v_A}{v_B} )^2 = \frac{r_B}{r_A} \\\\\frac{v_A}{v_B} = \sqrt{\frac{r_B}{r_A} } \\\\\frac{v_A}{v_B} = \sqrt{\frac{(800,000\ + \ 6.4 \times 10^6}{(500,000\ + \ 6.4 \times 10^6} )} \\\\\frac{v_A}{v_B} = 1.02 \\\\v_A = 1.02 \ v_B$

$v_A = v_B( 100\% \ + 2\%)\\\\v_A = 100\%v_B \ + \ \ 2\% v_B\\\\v_A = v_B \ \ + \ 2\% v_B$

Thus, the velocity of Satellite A is 2% greater than velocity of satellite B.

Learn more about velocity of satellite here: brainly.com/question/13981089

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3 years ago

The period of a mechanical wave is 5 seconds. What is the frequency of the wave?

viva [34]

The frequency of a wave is just the reciprocal of the period.For this one . . .
Frequency = 1/(period) = 1/(5 sec) = 0.2 per sec (0.2 Hz) .

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3 years ago

If you exert a force of 500 n to walk 4 m up a flight of stairs in 4 s, how much power do you use?

kobusy [5.1K]

P= work/time and work is = to force x distance so its 500x4 =2000joules
and 2000/4 =500 watts

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3 years ago

WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER *(AFTER THE FULL TEST)*

WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER (AFTER THE FULL TEST)