Question

question 19 of 25
a television of mass 13 kg sits on a shelf. what is the normal force acting on the television?
a. 13.0 n
b. 51.2 n
c. 99.4 n
d. 127 n

Explanation:

Step1: Identify forces acting

The television is at rest on the shelf. The normal force $N$ acts upwards and the gravitational force $F_g$ acts downwards. According to Newton's first - law, since the net force $\sum F = 0$ (as the object is at rest), $N = F_g$.

Step2: Calculate gravitational force

The gravitational force is given by the formula $F_g=mg$, where $m = 13\ kg$ and $g = 9.8\ m/s^2$. So, $F_g=13\times9.8 = 127.4\ N\approx127\ N$.

Answer:

D. 127 N