A ball is projected straight upwards with an initial velocity of 20 m/s. It will reach its maximum height in approximately Question 19Answera.2.5sb.1.02sc.3.06sd.2.04se.1.5s
Question
A ball is projected straight upwards with an initial velocity of 20 m/s. It will reach its maximum height in approximately Question 19Answera.2.5sb.1.02sc.3.06sd.2.04se.1.5s
Solution
The maximum height of a projectile launched upwards is reached when its velocity becomes 0. This is due to the deceleration caused by gravity.
The formula to calculate the time it takes to reach this point is:
t = v / g
where:
- t is the time,
- v is the initial velocity, and
- g is the acceleration due to gravity.
Given that the initial velocity (v) is 20 m/s and the acceleration due to gravity (g) is approximately 9.8 m/s², we can substitute these values into the formula:
t = 20 / 9.8
This gives us approximately 2.04 seconds.
So, the ball will reach its maximum height in approximately 2.04 seconds. Therefore, the correct answer is d. 2.04s.
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