Question

9. A force of 60 dynes acts upon a mass of 15g a) What acceleration is imparted to the body, b) What velocity will the body acquire in 8s? c) What distance will the body cover in this 8s?

Answer 1

Given:

$F=60 \rm \: dyn=0.0006\: N$

$m=15\:\rm g=0.015\: kg$

(a) the acceleration

$$a=\frac{F}{m}=\frac{0.0006\:\rm N}{0.015\:\rm kg}=0.04\:\rm m/s^2$$

(b) the final speed

$$v_f=v_i+at=\rm 0\: m/s+0.04\: m/s^2*8\: s=0.32\: m/s$$

(d) the distance

$$d=\frac{v+v_0}{2}t=\rm \frac{0\: m/s+0.32\: m/s}{2}*8\: s=1.28\: m$$