Question

ablest and metre is placed horizontally on a horizontal force of 50 newton is applied on in a sentence and point which is at a distance of 4 metre from B​

Answer 1

Solution is in the attachment

Answer 2

horizontal force on body = normal reaction force = 50 N  

so frictional force = 50 x 0.2 = 20N which just counteracts the weight of the body therefore weight of the body is also 20N