India's Largest Education Online Store: StudyNeeds.com | (011) 4501-7650 | Log In Here | Register Free

Doubt & Answer Explanation

Doubt

A ball of mass m hits a floor with a speed v making an angle of inclination alpha with the normal .the coefficient of restitution is e .find the speed of the reflected ball and angle of reflection.

Answer Explanation

After striking the floor, the horizontal component of the ball's velocity remains the same while the vertical component gets multiplied by e in the opposite direction.

Therefore, the magnitude of the velocity of the ball after striking the floor is ((vsin?)² + (evcos?)²)^1/2

The angle made by the final velocity of the ball with the horizontal is tan? = vsin?/evcos? = tan?/e.

Complete IIT JEE, AIEEE & BITSAT 2012 Online Course + Postal Correspondence Course + 36 DVD Set + Online Faculty Support

Complete Physics course combo (courseware + practice tests)
Complete Chemistry course (courseware + practice tests)
Complete Mathematics course combo (courseware + practice tests)
Full length Tests for IIT JEE, AIEEE, BITSAT, CEE and state level exams
Ask unlimited number of doubts to topIITcoaching faculty
Includes Postal Correspondence Course which comprises of entire courseware in over 30 books
Includes a CD which contains test series for IIT JEE, AIEEE & BITSAT with detailed answer explanation
Personalized recommendations based on your performance
Receive SMS alerts for all important Engineering exam events
Compare your performance against the nation

Rs 10500/- less 30% discount = Final Price Rs 5250/-

Buy Now

For questions call: 011-456-293-45, 011-456-293-46, 011-456-293-35