Aball is dropped and bounces off the floor. its speed is the same immediately before and immediately after the collision. which of the following is true about the collision between the ball and the floor?
a) the ball's momentum is conserved.
b) the ball's momentum changes direction but not magnitude.
c) the ball's momentum changes magnitude but not direction.
d) the impulse delivered to the ball by the floor is zero.
e) the impulse delivered to the floor by the ball is zero.

option B.

Explanation:

The correct answer is option B.

when the ball drops, the velocity of the ball before the collision is v

After the collision, the velocity of the ball is the same but in the opposite direction.

Impulse delivered to the ball and the floor, in this case, is not zero.

The magnitude of the momentum remains the same but the direction of the ball changes.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.