Question assuming the clay blob and the bouncy ball have the...

Question Assuming the clay blob and the bouncy ball have the same mass, and that you throw them with the same velocity, which would you throw to close the door: the clay blob, which will stick to the door; or the bouncy ball, which will bounce back at almost the same speed as it had before it collided with the door? Prediction Give your prediction here: Problem Test your prediction through calculation for the situations of the clay blob and the bouncy ball: Assume each has a mass of 10 grams, and each has an initial velocity of m/s straight at the door. Ignore the effects of gravity. Calculate the change in momentum of the clay blob, which strikes and sticks to the door, and the bouncy ball, which strikes and bounces straight back with the same speed.

Transcript

0:00 Hello friends.

00:02 In this question we have two kickers.

00:05 First is a clay ball.

00:08 This is a clay ball and a second is a bouncy ball.

00:17 Okay, this question i will ask you.

00:19 It should go then with the same velocity to close the withdraw.

00:23 The clay ball would stick to the door or the bouncy ball.

00:27 Which one will be able to close the door? if there would stretch the same speed.

00:35 So we have to sing the same.

00:36 So we have to sing.

00:36 Which one is giving the momentum because the door closes through the force or the momentum so we have to create that okay so in this question we have to first calculate the change in momentum so what will be to change in momentum like suppose we are throwing the clay ball onto the door like this okay what will is the momentum that the clay ball is containing now it is m cross v so what is m mass is given as 100 grams multiplied by you have to change it to make g multiplied by the velocity what is the velocity here given at 20 so the total momentum is 0 .2 kg meter per second this is the total momentum that is containing this momentum will be transferred onto the door when is not sticking on to the door.

01:43 So, total momentum transferred will be this much.

01:51 Point two.

01:52 Now in the second case, when it is bouncing back, this is a bouncy ball, it is going onto the door.

02:05 This is the initial diagram.

02:09 This is also the initial diagram.

02:13 So it is going onto the door and after the collision, it is going away from the door.

02:23 So there are two momentum for this.

02:30 In this case, the momentum is m into v, m multiplied by b...