Question

${}^{\prime }{P}^{\prime }$ and ${}^{\prime }{Q}^{\prime }$ horizontally push a $1200kg$ crate on a frictional surface in the same direction. ${}^{\prime }{P}^{\prime }$ pushes with a force of $500N$ and ${}^{\prime }Q$' pushes with a force of 300N. If a frictional force provides $200N$ of resistance, what is the acceleration of the crate?

• A. $1.3m/s^2$
• B. $1.0m/s^2$
• C. $0.75m/s^2$
• D. $0.5m/s^2$

Answer 1

The correct option is D $0.5m/s^2$

Total force on the block in a direction is: $F=(500+300)-200=600N$.

So the acceleration of the body will be:
$a=\frac{F}{m}=\frac{600}{1200}m/s^2=0.5m/s^2$