Answer:
A
Explanation:
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Answer:1.5
Explanation:
Given
mass of first cart 
initial Velocity 
mass of second cart 

In the absence of External Force we can conserve momentum




Final kinetic Energy of two masses



Initial Kinetic Energy




Answer:
Its state is in uniformly accelerated motion
Explanation:
When an object is acted upon the force of gravity only, we said that the object is in free fall.
According to Newton's second law of motion:

where F is the net force on an object, m is its mass, a its acceleration, when the net force on an object (F) is non-zero, than the object accelerates (because a is non-zero), so the object is in accelerated motion.
In case of free fall, the rate of acceleration of the object is equal to
, the acceleration due to gravity, and it is constant. So, the object is moving by uniformly accelerated motion.
B. It measures <span>changes in the variable that is being controlled
</span>The receptor senses environmental stimuli, sending the information to the integrating center.