Physics
For a body moving with uniform acceleration its final velocity equals ________

2 x average velocity - initial velocity
Average velocity + initial velocity
Average velocity - initial velocity
2 x average velocity + initial velocity

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Physics
What is the principle of a ''Life Jacket"?

It increases the volume of the person to keep him afloat
It provides oxygen to a drowning person
It decreases the volume of the person to keep him afloat
The person can sit on it like a raft

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