Compare and contrast mass ans weight using the equation from Newtons's Second Law .....?

Question

I need help with this question plese...

Compare and contrast mass ans weight using the equation from Newtons's Second Law to describe what two things weight is dependent upon.


also, do yo know this.. 2. Use the idea of conservation of momentum to explain how a rocket can move in outer space.


thank you!!

Answer 1

Newton's 2nd law states Force = mass x acceleration. The force of gravity is the force that the Earth pulls on you, otherwise known as your weight. Your mass is the amount of matter something has. If you were to travel to the Moon, your mass stays the same, but your weight would be less because the accelerstion due to gravity on the Moon is less. Mass is measured in Kg and weight can be measured in Newtons or pounds.


Conservation of momentum basically states that the total momentum stays the same. A rocket shoots out fast moving particles (fuel) out the bottom of the rocket and in turn applies a force in the opposite direction on the rocket (Newtons 3rd Law). The mass of the particles times the velocity of the particles is equal to the mass of the rocket times the velocity of the rocket in the other direction, because m1v1 + m2v2 = 0. The velocities are in opposite directions so one is negative so m1v1 + -m2v2 = 0 becomes m1v1 = m2v2.

Answer 2

weight depends on the mass of the body and acceleration of gravity at that point