During baseball practice, a batter hits a high flyball, and then runs in a straight line and catches it. which has the greater a
2 answers:
Answer:
The batter and the fly ball have the same average velocity, i.e. no individual velocity is greater than the other.
Explanation:
First of all, it is worthy of note that in a baseball game, when the batter hits the ball, he is expected to immediately make a run in an attempt to catch the ball, by so doing, the batter has a greater chance of catching the ball before it hits the ground and this is exactly what the batter has done in this practice.
1. The fly ball is hit and the batter runs immediately , this means the batter and the fly ball have the same start time t.
2. The batter catches the fly ball after certain time i.e. the same end time.
3. The batter runs in a straight line to catch the ball i.e. the displacement of both batter and fly ball from hit point to catch point is the same.
MATHEMATICALLY
Where D = Displacement and t = time
Average velocity
Where
and
This means
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Answer: 14. 49 m
Explanation:
We can solve this problem with the following equations:
(1)
(2)
Where:
is the horizontal distance between the cannon and the ball
is the cannonball initial velocity
since the cannonball was shoot horizontally
is the time
is the final height of the cannonball
is the initial height of the cannonball
is the acceleration due gravity
Isolating from (2):
(3)
(4)
(5)
Substituting (5) in (1):
(6)
Finally:
Answer:
a)
b)
Explanation:
The net force on the car must produce the centripetal acceleration necessary to make this circle, which is . At the top of the circle, the normal force and the weight point downwards (like the centripetal force should), while at the bottom the normal force points upwards (like the centripetal force should) and the weight downwards, so we have (taking the upwards direction as positive):
Which means:
The limit for falling off would be , so the minimum speed would be: