Are all solid natural non living matter on earth rock?
1 answer:
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Answer:
5.05 m
Explanation:
length of stick (L) = 1 m
distance from the top of the stick to the ground (d) = 2.07 m
time taken for corn to travel the length of the stick (t) = 0.121 s
acceleration due to gravity (a) = 9.8 m/s^{2}
we can get the distance in four stages.
- Finding the velocity the corn was moving at from
where s = length of stick, t = time, a = acceleration due to gravity
1 = 0.121u + (0.5 x 9.8 x 0.121 x 0.121)
1 = 0.121v + 0.0717
1 - 0.0717 = 0.121v
v = 7.67 m/s
- Using the velocity above to find the time it took for the corn to fall to the top of the stick from the formula v = u + at' where:
v = final velocity = 7.67 m/s
u = initial velocity = 0 m/s since it was initially at rest
a = acceleration due to gravity
t' = time taken to fall to the top of the stick
7.67 = 0 + (9.8 x t')
t' = 7.67 / 9.8 = 0.78 s
- using the time above to find the distance between the branch the corn falls from and the top of the stick using
where:
s = distance
v = initial velocity = 0 m/s since it was initially at rest
t = time = 0.78 s
a = acceleration due to gravity = 9.8
s = 0 + (0.5 x 9.8 x 0.78 x 0.78)
s = 2.98 m
- Add the distance between the branch the corn falls from and the top of the stick and the distance from the top of the stick to the ground.
2.98 + 2.07 = 5.05 m
For all elastic collisions we have
also by momentum conservation we will have
since two cars are identical so we know that
now by solving two equations we will have
so the correct answer must be
It attains the same speed as the first car.