A woman pushes her new John Deere walk behind mower to the right as she approaches her garage. If she pushes the 55-kg mower with a force of 120 N directed downward at an angle of 40 degrees, what is the acceleration if there is a frictional force of 42 N resisting its motion? What is the normal force acting on the mower?

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2