Physics: Rahul walks to his school which is at a distance of 3km from his home in 30 minutes.on reaching he finds that the school is closed and cones back by a bicycle with his friend and reaches home in 20 minutes. calculate his average speed in km/hr.

Rahul walks to his school which is at a distance

Ответ:

DwayneLeonard4088

24.02.2023

Incomplete question.The complete one is here

Spacecraft have been sent to Mars in recent years. Mars is smaller than Earth and has correspondingly weaker surface gravity. On Mars, the free-fall acceleration is only 3.8m/s2. What is the orbital period of a spacecraft in a low orbit near the surface of Mars?

T=5900s=99min

Explanation:

Given

$r_{satelite}=r_{mars}=3.37*10^{6}m\\ g_{mars}=3.8m/s^{2}\\$

To find

orbital period of a spacecraft T

Solution

An the initial calculating is computing the angular velocity of satellite :

$w=\frac{2\pi }{T}\\ w=\frac{2\pi }{110min}(1min/60s)\\ w=9.52*10^{-4}rad/s$

Computing T

$T=\frac{2\pi }{w}\\ as\\w=\sqrt{\frac{a}{r} }\\ So\\T=\frac{2\pi }{\sqrt{\frac{a}{r} }} \\T=\frac{2\pi }{\sqrt{\frac{3.8m/s^{2} }{3.37*10^{6} m} }}\\T=5900s=99min$

0,0(0 оценок)

Rahul walks to his school which is at a distance of 3km from his home in 30 minutes.on reaching he finds that the school is closed and cones back by a bicycle with his friend and reaches home in 20 minutes. calculate his average speed in km/hr.

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Physics

Ask an AI advisor a question