Answer:
no.
Explanation:
because the mass of an object never changes.
Answer:
It takes total 248 years for Pluto to orbit the sun.
As we know that it has all given data given as


distance moved = 0.250 km = 250 m
now we can use kinematics to find acceleration



so it will accelerate at rate of 0.86 m/s^2
Answer:
-1 m/s
Explanation:
From the law of conservation of linear momentum, the sum of initial and final momentum should be equal. Momentum, p is expressed as the product of mass and velocity. Therefore, p=mv where m and v represent mass and velocity respectively. In this case

Where subscripts d and u represent downwards and upwards respectively while c is common hence common velocity which is unknown in this case. Taking downwards as negative while upwards as positive then substituting -3 m/s for downward speed while 3 m/s for upward speed, the masses as given then
(2*-3)+(1*3)=(2+1)v
V=-1 m/s hence downward direction