Question

A force of $53N$ is applied to a $176.4N$ object that is at rest. A frictional force of $8N$ must be overcome to move the object. What is the acceleration of the object?

• A. $.3m/s^2$
• B. $2.5m/s^2$
• C. $2.9m/s^2$
• D. $4.24m/s^2$
• E. $6.625m/s^2$

Answer 1

Answer: (B)

$2.5m/s^2$

The mass of the object is $m=176.4/g=176.4/10=17.64kg$

Fro FBD: $ma=F-f=53-8=45$

or $a=45/m=45/17.64=2.5m/s^2$