3) Magnets are used to separate steel cans from aluminum cans in recycling plants. How can
1 answer:
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Answer:
The maximum height it reaches will be 20 m.
The time taken by it to reach the height will be: t = 2 seconds.
Explanation:
We know the equation of the motion under gravity
v² - u² = 2gs
u = initial velocity = 20 m/s
v = final velocity = 0 m/s
so
substituting u = 20 m/s, v = 0 m/s, g = -10 and
m
Therefore, the maximum height it reaches will be 20 m.
We know the equation
u = gt
substitute u = 20, g = 10
20 = 10 × t
t = 20/10
t = 2 seconds
Therefore, the time taken by it to reach the height will be: t = 2 seconds.
Answer: D!
It is the option with the greatest amplitude.
