# Question 51a0d

##### 1 Answer
Jan 19, 2017

a = 10.6 m.s⁻²

#### Explanation:

Calculate the resultant force (which is the larger pushing force minus the smaller friction force):
$F = 89 - 4 = 85 N$

Use Newton's Second Law of motion (for constant mass) to calculate the acceleration:
F = ma ⇒ a = F/ m = 85 / 8 = 10.6 m.s⁻²#