Question

Assertion (A) : When a ball hits a floor obliquely and gets reflected after inelastic collision, only the vertical component of its velocity gets changed.
Reason (R) : During collision the floor exerts a force on the ball only along the normal but not parallel to the surface

• A. Both Assertion (A) and Reason (R) are correct and R is the correct explanation
• B. Both Assertion (A) and Reason (R) are correct but the reason does not give the correct explanation
• C. A is true but R is false
• D. A is false but R is true

Answer 1

The correct option is A Both Assertion (A) and Reason (R) are correct and R is the correct explanation

During an oblique collision of ball with floor , the only force considered is normal reaction force which is always perpendicular to surface until clearly given rough surface no force parallel to surface is taken into account.