Center of MassHard
Question
A ball hits a floor and rebounds, then
Options
A.the momentum of the ball before and after the collision is same.
B.the mechanical energy of the ball may remains same during the collision
C.the total momentum of the ball and the earth is conserved
D.the total energy of the ball and the earth remains the same
Solution
Internal force between ball and earth can change kinetic energy but it can not change momentum of the ″ball plus earth″ system.
Create a free account to view solution
View Solution FreeMore Center of Mass Questions
A man of mass m is stationary on a stationary flat car. The car can move without friction along horizontal rails. The ma...A particle strikes a horizontal smooth floor with a velocity u making an angle θ with the floor and rebounds with v...A particle is moving along a circle with a constant speed u, as shown in figure. M is a plane mirror, then...Two identical charged spheres suspended from a common point by two massless strings of lengths ð‘™, areinitially at a d...A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest aft...