A man pulls a 50 kg box at a constant speed across the floor by puling a rope with a 200 N force at an angle of 30 degrees. A) Sum the forces in the x-direction. What is the value of the frictional force opposing the motion? B) Sum the forces in the y direction. What is the value of the normal force?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

How will the system respond to a temperature increase?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.