Physics newton law force question finding normal force?

Question

At the airport, you pull a 18-kg suitcase across the floor with a strap that is at an angle of 45° above the horizontal. Find (a) the normal force and (b) the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between the suitcase and the floor is 0.38.

Answer 1

The kinetic friction force is:
18*9.8*0.38 = 67 (N)
Hence the tension in the strap must have a horizontal component of 67N, that result the tension in the strap to be:
67N*sqrt(2) = 95N
notice this tension in the strap would also lift the suitcase vertically with 67N force. Hence:
(a) the normal force is: 18*9.8-67 = 1.1x10^2 (N)
(b) the tension in the strap is 95N

Answer 2

"although, once you're on a flat highway, the traditional rigidity constantly equals the load of the motor vehicle, applicable?" your no longer on a flat highway your on a rounded hill with a radius r so the concern would be taken care of utilising around action. there is not any longer in all probability everywhere the place the line is flat so Fn and mg are constantly appearing at some perspective counting on the place you seem on the motor vehicle. As an entire Fn acts up and mg acts down and a=v^2/r. For section c think of of it like this. the motor vehicle is transferring so quickly that gravity does not have adequate time to push the motor vehicle into the line and for the line to exert rigidity on the motor vehicle. think of of it like your working sooo quickly you may run throughout the time of water.