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The speed of a weighting car is 3000N Increases fron 36 km\h to 72 km\h uniformly . The change in momentum of the car is 3x10^x kg-m\s. Then x is |
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Answer» x=3Explanation:36km\h =10m/s73km/h =20m/sweight of CAR is 3000N soweight=mass×accelaration DUE to gravityw=mgm=w/g (g=10m/s^-2) =3000/10=300kgmomentum is GIVEN by p=mvso when v=10 then p1=300×10=3000kgm/sp2=300×20=6000kgm/schange in momentum p2-p1=6000-3000=3000kgm/s=3×10^3kgm/sso COMPARING with 3×10^x KG m/sx=3 |
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