Answer: An oxbow lake forms after there has been deposition of sediment, by the new cutoff channel flowing adjacent to it, at the entrances of the abandoned bend; this seals the bend off from the rest of the river.
One consequence of Newton's third law of motion is that all actions have equal and opposite reactions. <em>(C)</em>
In fact, that's pretty much what the law itself says in so many words.
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Answer:
Explanation:
Given that,
Height = 46m
Then, final height is y=-46m
Initial height yo=0m
Time to reach height is 5sec
a. Initial speed
Using equation of motion
y-yo = vot - ½gt²
-46-0 = vo• 5- ½×9.8×5²
-46 =5vo -122.5
5vo = -46+122.5
5vo =76.5
vo = 76.5/5
vo= 15.3m/s upward.
vo = 15.3m/s
b. How high does it rise
Using equation of free fall
At maximum height, the final velocity is 0m/s
v² = u² - 2gH
0² = 15.3² -2•9.8H
-15.3² = -19.6H
H=15.3²÷19.6
H=11.943m
Maximum height 11.943m
c. At maximum height the velocity is zero this is due to gravity provides the same acceleration to the ball on the way up (slowing it down) as on the way down (speeding it up), the time to reach maximum altitude is the same as the time to return to its launch position.
d. The magnitude of acceleration at the highest point is the same as the acceleration due to gravity(g=9.8m/s²).
e. The direction of the acceleration is downward, it is directed toward the negative y axis( -j)
a = -9.81m/s².
