Q12. How big is a Moon? How big is a Mars? What is therefore the weight of the person from Q11 on the Moon? What is the person's
1 answer:
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Answer:
<h2>3</h2>Explanation:
Using the efficiency formula. Efficiency = MA/VR * 100%
MA = Mechanical Advantage
VR = velocity ratio =
Distance moved by effort = 4.5m
distance moved by load = 1.5m
VR = 4.5/1.5 =3
Assuming efficiency is 100% (since friction can be ignored)
100% = MA/3 * 100%
1 = MA/3
MA = 3*1
MA = 3
Mechanical Advantage of the ramp is 3
Answer:
Part a)
Part b)
Explanation:
Part a)
As we know that the diameter of the planet is given as
now the radius of the planet is given as
now we know that the acceleration due to gravity of the planet is given by the equation
here we know that
now from above equation we have
now we have
Part b)
Now by kepler's law we know that
time period of revolution of planet about the star is given as
so we have
now we have
mula of time period
Now we have