A)planets
b)the sun
c)moons
e)comets
f)asteroids
So the acceleration of gravity is 9.8 m/s so that’s how quickly it will accelerate downwards. You can use a kinematic equation to determine your answer. We know that initial velocity was 19 m/s, final velocity must be 0 m/s because it’s at the very top, and the acceleration is -9.8 m/s. You can then use this equation:
Vf^2=Vo^2+2ax
Plugging in values:
361=19.6x
X=18 m
A protostar reaches equilibrium when gravity is balanced by the outward force of nuclear fusion.
Answer:
I don't know sorry For this question
