3a and c someone please help I really don't understand

Physics

1 answer:

earnstyle [38]3 years ago

3 0

F_x=Fcos(a)
F_y=Fsin(a)

1.F_x=166cos(55)
F_y=166sin(55) (55 because of the supplementary angle)

2.F_x= 575cos(-75) (complimentary angle/negative because its under x-axis)
F_y= 575sin(-75)

The values you get can be negative or positive depending on which side the vector is pointing at.

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A(n) 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s 2 . With what force does he press against the seat

forsale [732]

Answer:

Force, F = 187.42 N

Explanation:

It is given that,

Mass of boy, m = 30 kg

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Speed of the car, v = 7.3 m/s

The force acting on the boy are force of gravity and the centripetal force. The net force acting on him is as follows :

$F=mg-\dfrac{mv^2}{r}$

$F=m(g-\dfrac{v^2}{r})$

$F=30\times (9.8-\dfrac{(7.3)^2}{15})$

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So, he press against the seat with a force is 187.42 N. Hence, this is the required solution.

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