A photon and a mass m move directly toward each other. They collide head-on and create a new particle. If the total energy of the system is E, how should it be divided between the photon and the mass m so that the mass of the resulting particle is as large as possible

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

How do the forces acting on a boat compare to the force acting on a plane ?