Has anyone done the Physical Science B- Forces and Motion Unit Test?? If so could you please help me
1 answer:
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by the concept of momentum conservation we can say
if net force on a system of mass is ZERO then its momentum will remain conserved
Here a ball is projected upwards so if we take Ball + Earth as a system then total momentum of the system will remain conserved
Initially when ball is on the surface of earth the system has zero momentum and hence we can say after throwing the ball momentum of earth + ball must be zero
now using same equation we can say
given that
from above equation velocity of earth will be
so above will be the recoil speed of earth
Answer:
0.000000113 or 1.13* meters
Explanation:
One nanometer is meters. So 113 nanometers would be 113*
, or 1.13*
meters. That's expessed on "cientific notation." On the "usual" notation, it will be 0.000000113 meters.