Ptolemy life is probably my most recommenced
Answer:
Explanation:
The stunt will likely sustain serious injury in case of concrete blocks because the average force acting on the person will be more because concrete blocks do not squeeze to provide more time for the force to act on the body instead it acts for a small amount of interval.

As impulse is constant so time requires to act force on the body is more as compared to concrete block and thus average force in mattress case is less.
These forces form a force pair. Use Newton's third law, and you see that the trailer pulls back at with the same force. The answer is d.
Answer:
A. usually 3 cards a year means you have little or no credit I believe
Answer:
is the first confirmed terrestial planet to have been discovered outside the solar system by the kepler space telescope
Explanation: