A plastic baby truck with its trailer weighs 1.6 kg and runs on batteries by driving steadily at a speed of 9.0 km/h. While driving, a child puts a toy weighing 800 g in the trailer. The speed of the truck does not change.
Calculate the kinetic energy of the empty trailer truck.
Compare the kinetic energy of the empty trailer truck and the kinetic energy of the trailer truck with the toy.
By how much does the kinetic energy of the truck change when the child put the toy in the trailer?
At what speed should the truck drive after having the toy in the trailer in order to have the same kinetic energy as at the beginning?
