Abrick is lying on a table in a state of static equilibrium. if the mass of the brick is 7.52 kilograms, what is the normal force exerted by the table on the brick?
a. −73.7 newtons
b. 73.7 newtons
c. 80.7 newtons
d. 7.52 newtons
e. 8.07 newtons
i believe the answer is either a. or b.—i'm just not sure if it should be expressed as a negative or not because the force is acting in the opposite direction.
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Ответ:
∑F along x = 0 = F - Fn
Fn = F = mg = 7.52(9.81) = 73.77 N <OPTION B
Ответ:
2: March
3: January, and December
4: August, September, and October
5: October