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Dale and Alex push on opposite sides of a couch. Dale pushes to the left with
a force of 100 N, while Alex pushes to the right with a force of 175 N. If the
couch has a mass of 55 kg, what is the acceleration of the couch?
O A. 5 m/s2 right
O B. 5 m/s2 left
O c. 1.4 m/s? right
O D. 1.4 m/s2 left
SUBMIT

Respuesta :

MathPhys

Answer:

C. 1.4 m/s² right

Explanation:

Apply Newton's second law.  Take right to be positive and left to be negative:

∑F = ma

175 N − 100 N = (55 kg) a

a = 1.4 m/s²

The couch accelerates to the right at 1.4 m/s².