Answer: The product of mass and velocity is momentum.
Explanation: A good way to summarize momentum is to say momentum is mass in motion. All objects have mass, but not all objects are moving; therefore, not all objects have momentum. If an object is moving, though, it has momentum.
Answer:
Explanation:
Friction literally helps us in ways we can't even think of. Without it I wouldn’t be able to hold my phone as easily as I am doing… Now coming to few other things that would have been impossible without friction are :
Sneezing and still staying in the same place.
Belt-pulley drive
Ease in normal walking
Holding a bottle for drinking water
(1/2)(5.0)(v²) = 150
v= 7.75m/s
Assume that the average life expectancy is about 72 years, according to recently published data.
Therefore a generation is
72/3 = 24 years.
Therefore over the last 2,000years, the number of generations that have passed is
2000/24 = 83.3
Answer: 83 generations