Home › CBSE Class 11 (Science) › Physics › Laws of Motion › As per your syllabus, when a billiard ball strik…
As per your syllabus, when a billiard ball strikes the wall normally at speed u and reflects at speed u, the impulse on the ball is which?
A0 (no change)
B2 m u (away from wall)
Cm u² (sideways)
Dm u (away from wall)
Answer & Solution
Correct answer: B. 2 m u (away from wall)
syllabus Ex 4.5: Δp = m u − (−m u) = 2 m u along the outward normal.
Related questions
A book rests on a desk. Why are weight and normal force not an action-reaction pair?Two blocks of 2 kg and 3 kg touch on a smooth desk. A 10 N push gives acceleration?A block slides down a smooth 30 degree incline. Its acceleration? (g = 10 m/s²)The same lift accelerates down at 2 m/s². Normal force on the 60 kg person? (g = 10)A lift carrying a 60 kg person accelerates up at 2 m/s². Normal force? (g = 10)The maximum safe speed of a car on a level curve is independent of?A car on a level road has µs = 0.5 and turn radius 20 m. Maximum speed? (g = 10)What supplies centripetal force for a car turning on a level road?