Aprojectile is launched at a diagonal angle and is in the air for 17.5 seconds. how long does it take the projectile to reach its apex?
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Ответ:
Explanation:
For a projectile the total time it stays in the air is called the flight time. The path traced during a projectile motion is parabolic with symmetry of time and distance.
Given that the projectile having a flight time of 17.5 seconds, will reach the top point in half of the flight time taken by it:
So,
is the time by the end of which the projectile will be at its apex having the vertical component of velocity as zero.
Do note that during a projectile analysis we neglect the air resistance due to which we have a constant horizontal component of the velocity and the vertical component of the velocity varies under the influence of gravity. The vertical velocity at the top becomes zero.
Ответ:
False
Explanation:
Because, As of the third quarter of 2020, there are 36 million daily active users of Twitter in America (Twitter, 2020). Meanwhile, The number of US Twitter users is 69.3 million as of January 2021