Beginning at time t = 0, a student exerts a horizontal force on a box of mass 30 kg, causing it to move at 1.2 m/s toward an elevator door located 16 m away, as shown above. The coefficient of kinetic friction μk between the box and the floor is 0.20.
(b) Calculate the magnitude of the horizontal force the student must exert on the box in order to keep it moving at 1.2 m/s.

Question

Beginning at time t = 0, a student exerts a horizontal force on a box of mass 30 kg, causing it to move at 1.2 m/s toward an elevator door located 16 m away, as shown above. The  coefficient of kinetic friction μk between the box and the floor is 0.20.
(b) Calculate the magnitude of the horizontal force the student must exert on the box in order to keep it moving at 1.2 m/s.

surry99 · Answer

Draw a fbd and break the forces into components and apply Newtons second law

anonymous · Answer

i did how do you magnitude of a horizontal force the student must exerted on the box to keep it movies in 1.2 m/s