Fthe same net force is applied to a 7 kg object and a 21 kg object, then the a- 21 kg object accelerates three times faster than the 7 kg object. b- the 7 kg object accelerates three times faster than the 21 kg object. c- both objects accelerate at the same rate because the force is the same. d- neither object will accelerate because there is a net force on the objects.

B- the 7 kg object accelerates three times faster than the 21 kg object

From second Newton's law of motion;

F = ma , where F is the resultant force, m is the mass and a acceleration

In this case; if F is the same for 7 kg and 21 kg object then acceleration will be;

F = ma ; a = F/7

For 21 kg ;

F = 21 a ; a = F/21

Therefore; the 7 kg object accelerates three times faster than the 21 kg object

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j