Question

look a the free - body diagram below and determine the net force acting upon the object.
a) zero
b) 5 n, east
c) 3 n, south
d) 6 newtons

Explanation:

planation:

Step1: Analyze vertical forces

The normal force $F_{norm}=3N$ acts upwards and the gravitational force $F_{grav}=3N$ acts downwards. The net - force in the vertical direction $F_{net - y}=F_{norm}-F_{grav}=3 - 3=0N$.

Step2: Analyze horizontal forces

The applied force $F_{app}=5N$ acts to the right and the frictional force $F_{frict}=5N$ acts to the left. The net - force in the horizontal direction $F_{net - x}=F_{app}-F_{frict}=5 - 5=0N$.

Step3: Calculate the net force

The net force $F_{net}=\sqrt{F_{net - x}^{2}+F_{net - y}^{2}}=\sqrt{0^{2}+0^{2}} = 0N$.

Answer:

A. Zero