Question

A force $f_1$ pushes on an object of mass 10 kg with a force of 5 N to the right. A force pushes on the same object with a force $f_2$ of 15 N to the left. What is the acceleration of the object?

• A. 0.3 $m/s^2$ to the left
• B. 0.5 $m/s^2$ to the left
• C. 1 $m/s^2$ to the left
• D. 1.5 $m/s^2$ to the left
• E. 10 $m/s^2$ to the left

Answer 1

Answer: (C)

1 $m/s^2$ to the left

Newton's Second Law tells us that $F_{net}=ma$.

The net force acting on the object is: 1 5 N (left) - 5 N (right) = 1 0 N left.

With that in mind, we can simply solve for acc.
$a=\frac{F_{net}}{m}=\frac{10N}{10kg}$
1 $m/s^2$ to the left