81.25m/s A 62-kg child is sitting on a wagon full of bricks that has a mass of 150 kg. In order to move the wagon
without touching the ground; the child throws two bricks each of mass 3.0 kg in the direction opposite to the
direction the wagon is to go. How fast will the wagon move if the bricks are thrown at 2.0 m/s?

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?