At what speed do a bicycle and its rider, with a combined mass of 120 kgkg , have the same momentum as a 1800 kgkg car traveling at 4.6 m/sm/s

69m/s

Explanation:

Step one:

given data

mass of a bicycle and its rider m1=120 kg

mass of car m2=  1800 kg

velocity of car= 4.6m/s

Required

The velocity of the  bicycle

Step two:

The momentum expression is m1v1= m2v2

make v1 subject of the formula, divide both sides by m1

v1= m2v2/m1

v1= 1800*4.6/120

v1= 8280/120

v1=69m/s

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

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