Question

ANSWER THE FOLLOWING:

1. Earth attracts apple from the tree and it falls on it but the earth does not

move towards the apple. Why?

2. Is uniform circular motion taking place at a constant speed or constant

velocity? Why?

3. Name the force which is required to maintain a body in uniform circular

motion?

4. A ball is projected vertically upwards with an initial velocity of u goes to a

maximum height h before coming to ground. What is the value of h?

5. Is value of ‘g’ same everywhere?

6. Find relationship between ‘g’ and ‘G’

7. During a free-fall what is the weight of a body. Give reason for the answer.

8. A stone and feather are thrown from a tower, both the objects should reach

the ground at same time but it does not. Why?

9. What is the value of ‘G’, universal gravitational constant?

10. Find the value of ‘g’, acceleration due to gravity.

11. Calculate the value of ‘g’ on moon.

12. Show that the weight of the body on moon =1/6 of the weight of the body

in earth.
Please give brief answers and not one word.​

Answer 1

Answer:

no1.

Explanation:

earth attracts apple from the tree and it falls on it,but the earth does not move towards the apple. Why? Because mass of apple is negligible against the mass of earth So, due to gravitational force earth attracts apple and apple doesn't attracts the earth

Answer 2

1. because the apple is attracted by the gravitational force of earth, and the mass of apple is negligible to the mass of earth

2. An object when moves in auniform circular motion is having a constant speed. While thespeed of the object is constant, its velocity is changing. Velocity, being a vector, has a constantmagnitude but a changing direction

3. centripetal force

4. If a ball travels vertically upwards with the initial velocity u, the maximum height h would be the following which I have shown :

v^2 = (u^2) + (2*(-g)*h)

v^2 = (u^2) - 2gh

h = (u2 - v2)/2g

here h is distance in metres,

v is the final velocity in metres per second,

u is the initial velocity in metres per second,

and

g is acceleration due to gravity, 9.8m/s^2.(you can also take 10m/s^2 unless specified)

5. NO :'(

6. The acceleration on an object due to the gravity of any massive body is represented by g, whereas the force of attraction between any two unit masses separated by unit distance is called universal gravitational constant which is represented by G

7. The reason is that acceleration due to gravity acting on a body having free fall is zero. Thus.....

8. Stone and Feathers take varying times to reach the ground due to Air pressure and Gravity because the stone and the feather are of different weight, which is why both the objects do not meet the ground at the same time.

9. Constant of gravitation(G) is equal to 6.67 × 10−11 N or (m/kg^2)

10. Not a proper question, because the value of g and acceleration due to gravity varies from place to place and depends on location

11. I cant find it because you have not given the mass and radius of moon, I dont have much knowledge because I'm in 9th, so...please cooperate

12. I cant do it. Having some problems with this one

Hope the rest helps u, have a good day ahead ^-^