Indicate when conservation of momentum can not be used There are forces acting o

Question

Indicate when conservation of momentum can not be used There are forces acting on the objects There are internal forces between the objects There is a net external force acting on the objects There are more than two objects Indicate when conservation of energy can not be use. When collisions occur between objects When two objects collide and stick together When there is a change in height of an object When an object accelerates Which statement is true regarding the acceleration due to gravity, g? g = 9 8 m/s^2 is a universal constant Each planet has it's own constant g, depending on its mass Each planet has it's own constant g. depending on its density g depends on the mass of a planet and the distance from that planet's center

Explanation / Answer

Q1)

Fnet = dP/dt

Fnet = Fext + Fint

If Fnet = 0

P is conserved

There is a net external force acting on the objects

_________-

Q2)

IN Inelastic collision energy is not conserved

When the two objects collide and stick together, the collision is Inelastic

____________

Q3)

g = GM/R^2 = G*rho*(4/3)*pi*r^3/r^2

g = G*rho*(4/3)*pi*r

rho density of the planet

Each planet has its own constant g, depending on its density

g depends on the mass of the planet and the distance from the planet's center

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