avalonr2003
18.11.2019 •
Physics
A4-kg mass moving with speed 2 m/s, and a 2-kg mass moving with a speed of 4 m/s, are gliding over a horizontal frictionless surface. both objects encounter the same horizontal force, which directly opposes their motion, and are brought to rest by it. which statement best describes their respective stopping distances?
a) both masses travel the same distance before stopping.
b) the 2-kg mass travels twice as far as the 4-kg mass before stopping
c) the 2 kg mass travels greater than twice as far
d) the 4-kg mass travels twice as far as the 2-kg mass before stopping
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Ответ:
B) The 2-kg mass travels twice as far as the 4-kg mass before stopping
Explanation:
As we know that both mass have same horizontal force opposite to their motion
So we will have
now the stopping distance of an object moving with initial speed v is given as
so here we have
for other object we have
So correct answer will be
B) The 2-kg mass travels twice as far as the 4-kg mass before stopping
Ответ:
Explanation:
the researchers hope to improve their understanding on that particular subject and to also make the research accurate