An astronaut on Mars kicks a soccer ball at an angle of 45.° with an initial velocity of 15. m/s. If the acceleration of gravity on Mars is 3.7 m/s, a) What is the range of the soccer kick on a flat surface? b) What would be the range of the same kick on the Moon, where gravity is one–sixth that of Earth?

Respuesta :

Answer:

60.7 meters on Mars.

137.8 meters in the Moon

Step-by-step explanation:

We have information about the problem statement, the following data:

Vi = 15 m / s

w = 45 °

Gmars = 3.7 m / s ^ 2

The first thing is to calculate the velocity components, like this:

Vix = 15 * cos (45) = 10.6 m / s

Viy = 15 * sin (45) = 10.6 m / s

The time t in the delay in reaching the maximum vertical displacement in y, is given by the following equation:

Vfy = Viy - Gmars * t

Knowing that Vfy is equal to 0, we can calculate the value of t:

0 = 10.6 - 3.7 * t

t = 10.6 / 3.7 = 2.87 seconds, but it should be borne in mind that the total time taken is double therefore it would be 2.87 * 2 = 5.73 seconds.

Now, the movement in x is given by the equation:

x = Vix * t

Replacing we have:

x = 10.6 * 5.73 = 60.7 meters.

60.7 meters would be the range of the kick on Mars.

Moon

Now, on the moon the same procedure is repeated, only the gravity that is 1/6 of the earth changes, therefore:

9.8 * (1/6) = 1.63 m / s ^ 2, now the equation would be as follows:

Vfy = Viy - Gmoon * t

Knowing that Vfy is equal to 0, we can calculate the value of t:

0 = 10.6 - 1.63 * t

t = 10.6 / 1.63 = 6.5 seconds, but it should be borne in mind that the total time taken is double therefore it would be 6.5 * 2 = 13 seconds.

x = Vix * t

Replacing we have:

x = 10.6 * 13 = 137.8 meters.

137.8 meters would be the range of the kick in the moon.

Step-by-step explanation:

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