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4 years ago

Calculate the speed of a satellite moving in a stable circular orbit about the earth at a height of 4800 km

Physics

1 answer:

forsale [732]4 years ago

6 0

The speed of satellite or orbital speed is given by below formula.

V = sqrt (GM/R)

where

G = is the gravitational force

M = earth's mass

R = radius of its orbit.

Solving for the Orbital Speed,

First add the earth's radius to the height of satellite wrt to the earths surface, we have R = 6.59x10^6 m + 4.8 x 10 6 m = 11.39x10^6

Now

V = sqrt ((6.673 x 10-11*5.98x1024 kg)/11.39) =5919 m/s

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A race car makes one lap around a track of radius 180 m in 90.0 s. What is the centripetal acceleration in m/s2?

kvasek [131]

Answer:

0.9m/s^2 (yours is 0.87, so choose that)

Explanation:

formula for centripetal acceleration:

v^2/r

to find v, we know that f=1/90s, and r=180m.

v=(2pir)/T

v=(2pi(180))/90

v=12.6m/s

now plug into a=v^2/r

a=(12.6)^2/180

a=0.9m/s^2

4 0

3 years ago

GIZMO

CaHeK987 [17]

It is A or D but I believe A

5 0

3 years ago

10. Define and give 2 examples of kinetic energy. Be sure to include the two factors that make an object’s kinetic energy increa

Mademuasel [1]

You can describe kinetic energy and the potential energy of motion to get your answer.

7 0

4 years ago

If an athlete leaps vertically at 4.0m/s, what maximum height does he reach?

joja [24]

Hello
This is a problem of accelerated motion, where the acceleration involved is the gravitational acceleration: $g=-9.81~m/s^2$ , and where the negative sign means it points downwards, against the direction of the motion.

Therefore, we can use the following formula to solve the problem:
$v_f^2 = v_i^2 + 2gS$
where $v_i=4~m/s$ is the initial vertical velocity of the athlete, $v_f=0$ is the vertical velocity of the athlete at the maximum height (and $v_f=0~m/s$ at maximum height of an accelerated motion) and S is the distance covered between the initial and final moment (i.e., it is the maximum height). Re-arranging the equation, we get
$S= \frac{v_f^2-v_i^2}{2g}=0.82~m$

3 0

3 years ago

You can see a magnetic field of a magnet by using:

PSYCHO15rus [73]

Answer:

Option C

Explanation:

Iron is magnetic, so when you shave it into tiny pieces and use a magnet all the little pieces are going to form the shape of the magnetic field. copper isnt magnetic, option B is just ubsurd, and DONT EVER put a magnet next to your phone, if the magnet is strong enough you could damage it.

Please mark as brainliest :)

6 0

3 years ago

Read 2 more answers