## The question of minimum time and minimum distance in crossing a river.

A man crosses a river in a boat if he crosses the river in minimum time he take 10min with a drift 120metre if he crosses the river taking shortest path he takes 12.5min find the width of the river Incoming search terms:crossing a river in shortest distance and timecrossing the river in minimum timephysics […]

## Concept of magnetic dipoles

“Can u explain Concept of magnetic dipoles” – Sam Asked Answer: A magnet always exist in pairs. A magnetic dipole consists of two equal and opposite poles separated by a small distance. The magnetic poles cannot exist alone. Monopoles does not exist. A single current carrying loop is a simple practical  example for a magnetic dipole. Please refer […]

## Physics Portions for SA1 Class IX CBSE

Motion, force and work Motion : Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, equations of motion by…

## A body covers a distance of 20 m in 7th sec and 24 m in the 9th sec. How much shall it cover in 15s ?

“A body covers a distance of 20 m in 7th s and 24 m in the 9th s. How much shall it cover in 15s ?”  - Raghav posted this question.   Answer: From the eqn for displacement in the nth second, For the displacement in the 7th sec, we get, …………………….. (1) For the displacement in […]