Home » Posts tagged 'circular path'
Tag Archives: circular path
AskPhysics Updates
- Strike while the iron is hot !AskPhysics Blog Feed Dear students, CBSE has given you more time for exams. We have approximately 7 days before the Physics exams. How to use this seven days effectively for a thorough revision is very important. 7-8 days of sleeping is a must. One hour of exercise 1 to 2 hours for break fast lunch […]
- Dreams come true only for those who do their partAskPhysics Blog Feed I was recently narrating the life story of a girl from Dindigul who got married to a police constable at the age of 14. She was not even reached class 10. She became the mother of two kids by the age of 18. During that time she had to accompany her husband […]
- “DID THOSE PHILOSOPHERS WORK IN VAIN”AskPhysics Blog Feed “The Philosophers who worked in search of the Philosophers’ stone and those set themselves dedicated to find the elixir of life”The works of those in search of the Philosopher’s stone didn’t go in vain, They made the beginning. The beginning itself was so wonderful that anyone who got touched by the idea […]
- Quarks, conservation, entanglementAskPhysics Blog Feed Doubt from AskPhysics.comI have heard the following statements-> 1. Quarks always exist in a group of 2 or 3, and can not stand alone. 2. Protons are made up of 2 up quarks, and 1 down quark. 3. Quantum mechanics allows us to entangle a particle by somehow dividing it into 2(For […]
- Prepare for Physics oral test too during lockdownAskPhysics Blog Feed Plus Two Physics Oral Test series Many schools have started oral questioning also as part of diagnostic and formative assessment. The initiative was … Prepare for Physics oral test too during lockdown The post Prepare for Physics oral test too during lockdown appeared first on Ask Physics.
- Theory of RelativityAskPhysics Blog Feed The basic concepts of relativity are explained in a very simplified way that are easy to understood by Mr. Vivek Sawhney in this YouTube Video… The video focuses upon the general discussion on Theory of Relativity….What is the theory of Relativity? What is time dilation and length contraction? SUBSCRIBE to the YouTube […]
- A numerical problem from motion in 1 DimensionAskPhysics Blog Feed A boy plays with a ball on a field surrounded by a fence which has a height of 2.5m . He kicks the ball vertically up from a height of 0.4m with a speed of 14 ms−1. (a) What is the maximum height of the ball above the fence? (b) What is […]
Why gravitational force of attraction is necessary for a satellite to revolve around earth?
The question was posted by Raj Kumar.
The satellite has a velocity. To revolve around, the direction of velocity must change. In the absence of a force it can move only in a straight line. It is the gravitational force which helps the satellite top change direction and revolve around the earth.
In other words, for a satellite to revolve in a circular path, a centripetal force is required. This centripetal force is provided by the force of gravitation only.
Incoming search terms:
- centroid of gravitational force
Misconception on Work and energy conservation
It is said that when work is done energy is lost. But when a man runs in a circular path and reaches the starting point, then the work done is zero but energy is lost. (Divyam asked)
Answer: The work done here is not zero, work is done and energy is spent to overcome friction. Though he is reaching the same point, he is moving against a non conservative force, friction (where the work done in a closed path is not zero)