Sponsor Area
Under what condition is the relation s=ut is correct?
This condition is only true if body is moving in uniform velocity, as there will be no acceleration and distance covered per unit time will be constant.
Sponsor Area
State relation between impulse and momentum?
Momentum is mass in motion, and any moving object can have momentum. An object's change in momentum is equal to its impulse. Impulse is a quantity of force times the time interval.
Action and reaction forces do not balance each other why?
Action and reaction exist in pair and are always equal in magnitude and opposite in direction. But they act on different bodies, hence they cannot balance each other.
Two billiard balls each of mass 0.05kg moving in opposite directions with speed 6m/s collide and rebound with the same speed. What is the impulse imparted to each ball due to other
Impulse (I) = Change in linear momentum
Initial momentum of ball ( both) = mv =
0.05×6 = 0.30 Kg m/s
Final momentum of both balls = -(0.05×6)Kg-m/s .
here minus sign is because the direction of final momentum is just opposite to the direction of initial momentum (linear momentum is a vector )
Now impulse imparted to each ball ;
I = -0.30 - ( 0.30) = -0.60 Kg-m/s
Sponsor Area
Mock Test Series
