Question

blank 1 point
a 5 kg block is pulled across a table by a horizontal force of 40 n with a frictional force of 8 n opposing the motion.
calculate the acceleration of the object.
hint: remember that you need to work with the net force first.
8 n 5 kg 40 n
answer: type your answer.. choose your answer..

Explanation:

Step1: Calculate the net force

The net force \(F_{net}\) is the difference between the applied force \(F_{applied}\) and the frictional force \(F_{friction}\).
\(F_{net}=F_{applied}-F_{friction}\)
\(F_{net}=40 - 8\)
\(F_{net}=32\space N\)

Step2: Use Newton's second law \(F = ma\) to find acceleration \(a\)

We know \(F = ma\), so \(a=\frac{F}{m}\)
Here \(F = F_{net}=32\space N\) and \(m = 5\space kg\)
\(a=\frac{32}{5}\)
\(a = 6.4\space m/s^{2}\)

Answer:

\(6.4\space m/s^{2}\)