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 5 line answers.
Answers
Answered by
4
Answer:
1. Because Earth has the gravity to pull towards itself, but the Apple don't. Earth has greater mass than the Apple.
2. Uniform circular motion takes place in constant speed because when a body or a particle is in uniform circular motion, it's velocity and direction at each point of the circular path.
3. Centripetal force is required to maintain a body in uniform circular motion.
8. When a stone and a feather are thrown from a tower, it doesn't reach the ground at the same time because the mass of the stone is greater than the feather.
Similar questions