00:01
Here a toy car slides down a ramp and collides elastically with a toy truck which is initially at rest.
00:16
And after collision the car is at rest and we have to find the final velocity of the truck.
00:24
So first we will find the speed of car just before collision using energy conservation principle.
00:33
Energy at top of ramp will be equal.
00:36
To energy at bottom before collision with truck for the car so at top energy will be equal to mass of car g h potential energy at bottom it will convert to kinetic energy half mc mc mc is mass of car and v is speed so v will be equal to 2 g h equal to 2 into 9 .8 meter per second square into 0 .6 meters.
01:21
So this gives us 3 .43 meter per second.
01:36
This is the speed of car just before colliding with the truck.
01:42
Now when it collides with the truck, the momentum conservation principle will apply.
01:49
So momentum of car plus truck system before collision.
01:55
P .i will be equal to momentum after collision.
01:58
So before collision, the truck was at rest...