Answer:
The centripetal force is 663.95 N.
Explanation:
Given that,
Mass of the child, m = 19 kg
Angular velocity of the merry-go-round,
Distance from the center, r = 2 m
We need to find the centripetal force acting on the child. The centripetal force is given by the formula as :
F = 663.95 N
So, the centripetal force is 663.95 N. Hence, this is the required solution.
B. Static friction force - static friction is the force put on an object to keep that same object at rest
You multiply the length of time by the speed, to get 100m/s
Answer: Gravitational force
Explanation:
The sun is known as a star in the centre of the solar system. It is the most important source of energy for life on earth. It is also known as a yellow dwarf star with gravity that holds the solar system together in its orbit. Our seasons, ocean current, weather, climate and radiation belts are motivated by the interaction between the sun and earth. The sun is made up of 91% hydrogen and 8.1% helium by atoms, 70.6%hydrogen and 27.4% helium by mass.
The sun and other stars masses are held by Gravitational force attraction that accounts for the great heat and light they generate.
Gravitational force is the force by which planets or other body draws objects toward its center. The gravitational force of the sun keep the earth in orbit around which enables the great heat and light generated by the sun. This also applies to other stars.
Answer:
a. The Sun is 110.24 cm.
b. The distance of the nearest star at 4.24 light years is 3.1586 × cm.
Explanation:
Given a scale :
12700 Km : 1 cm
a. How large is the Sun of diameter 1.4 × Km?
Thus using the given scale, we have to compare the diameter of the Sun to that of the Earth.
=
= 110.2362
The Sun is 110.24 cm.
b. how far away is the nearest star at a distance of 4.24 light-years on this scale?
A light year is a term that is used to express the total distance that light would travel in an empty space in a year.
One light year = 9.461 × Km
So that,
4.24 light years = 4.24 × 9.461 × Km
= 40.11464 × Km
Using the given scale,
= 3.1586 ×
The distance of the nearest star at 4.24 light years is 3.1586 × cm.