## Excel in math and science

### Master concepts by solving fun, challenging problems.

## It's hard to learn from lectures and videos

### Learn more effectively through short, conceptual quizzes.

## Our wiki is made for math and science

###
Master advanced concepts through explanations,

examples, and problems from the community.

## Used and loved by 4 million people

###
Learn from a vibrant community of students and enthusiasts,

including olympiad champions, researchers, and professionals.

## Comments

Sort by:

TopNewestBeacaus of centrepetal force or centre seeking force – Devang Patil · 1 year, 2 months ago

Log in to reply

no, again uncertainty is involved in all the trajectories of the electron – Fahad Shihab · 3 years, 6 months ago

Log in to reply

if centrifugal force equals to the that of centripetal force ................ – Abhimanyu Manu · 3 years, 6 months ago

Log in to reply