Question

The mass of a truck with its cargo is 1800 kg. The truck is coasting to the right with a speed of 10 m/s. As it coasts its cargo of mass 300 kg is lifted up out of the truck by a crane. What will the velocity of the truck be after its cargo is taken off?

Answer 1

i would round it out to be 15 ms or 20 good luck

Answer 2

Here we apply conservation of linear momentum. The momentum of the truck with cargo and without cargo remains constant. That is,

`mv=m'v'`.

Here
`m,v` are initial mass and velocity.
`m',v'` are final mass and velocity. Here
`m=1800,v=10` and
`m'=1800-300=1500`.

The velocity of the truck be after its cargo is taken off is

`image`