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Question 3.Two forces are acting on a 30-kg object, 200 N up and 300 N

down. What is the magnitude and direction of its acceleration?

A. It is 100 m/s2 upward,

B. It is 100 m/s2 downward.

C. It is 3 m/s2 upward.

D. It is 3 m/s2 downward.

Respuesta :

Answer:

It is 3 m/s² downward.

Explanation:

The mass of an object, m = 30 kg

Upward force, F = 200 N

Downward force, F' = -300 N

We need to find the magnitude and direction of its acceleration.

Net force = F+F'

= 200+(-300)

= -100 N

We know that,

Force, F = ma, a is acceleration of the object

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{-100}{30}\\\\a=-3.33\ m/s^2\approx -3\ m/s^2[/tex]

Hence, the acceleration is -3 m/s² and it is acting in the downward direction.

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