Question

1. In bench pressing 100 kg, a weight lifter applies a 1040 N force to the bottom of the bar.  

Answer 1

$F_{net}=ma\to F-mg=ma\to a=\frac{F-mg}{m}=\frac{1040-100\cdot9.81}{100}\approx0.6 \ (m/s^2)$ . Answer