Answer:
distance =13km , displacement=3km
Explanation:
north south does not affect displacement
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:
Since there is attraction force between two charges so the other charge must be - 3C
Explanation:
As we know that the force between two charges is given by formula

here we know that

also we know that

r = 8 cm
now we have

so we have

Answer:
because it's on an upward climb therefore newton's law of motion is in place and you're car is pulled by gravity
They’re falling toward earth & moving forward at about the same velocity. because the downward and forward forces are nearly equal, the astronauts are not pulled in any specific direction, so they float . <span>
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