A ball rolls without slipping down the ramp which is in inclined plane at an angle thita show that the ball accelration and magnitude of friction force on the ball is alpha =5/7gsinx, f=2/7mgsinx

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

What practical value did astronomy offer to ancient civilizations?