A ball is released from rest at the left of the metal track shown. Assume it has only enough friction to roll, but not to lessen its speed. Rank momenta from greatest to least at each point. Rank from greatest to least. To rank items as equivalent, overlap them.

The slope of a velocity time graph over any interval of time gives the during that interval

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

The molecular weight of oxygen gas (o2) is 32 while that of hydrogen gas (h2) is 2. prove that under same physical conditions, the velocity of sound in hydrogen is four times that in oxygen