Use the slider to change the value of h. How does changing the value of h affect the vertex?
2 answers:
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Answer: 10 minutes
Step-by-step explanation:
Given : Three postal workers can sort a stack of mail in 20 minutes, 30 minutes, and 60 minutes, respectively.
Let T be the time taken by all of them when they working together.
Then , we have the following equation :-
Hence, the time taken by all of them when they working together = 10 minutes.
Answer:
38.6 m/s
Step-by-step explanation:
The motion of the ball is a projectile motion, which consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction
Therefore we have to analyze the horizontal and vertical motion separately.
Along the horizontal direction, the velocity is constant during the motion, since there are no forces acting in this direction. So the horizontal velocity 3 seconds after the launch will be the same as the velocity at the launch:
The vertical velocity instead changes according to the suvat equation:
where
is the initial vertical velocity
is the acceleration due to gravity
t is the time
Therefore, after t = 3 s,
So the velocity after 3 seconds is < 25, -29.4 > m/s. The magnitude of the velocity is