A ball gets pushed off a 1.2m high table with a horizontal speed of 9m/s. Calculate how far the ball will travel horizontally before hitting the ground?
Answers
Explanation:
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AP Physics B : Calculating Motion in Two Dimensions
Study concepts, example questions & explanations for AP Physics B
Example Questions
AP Physics B Help » Newtonian Mechanics » Motion » Linear Motion » Calculating Motion in Two Dimensions
Calculating Motion In Two Dimensions : Example Question #1
An object is shot from the ground at 75m/s at an angle of 45⁰ above the horizontal. How high does the object get before beginning its descent?
Possible Answers:
140m
70m
280m
420m
Correct answer:
140m
Explanation:
The velocity must be broken down into x (horizontal) and y (vertical) components. We can use the y component to find how high the object gets. To find vertical velocity, vy, use vy=vosinθ.
vy=(75ms)sin45o=53ms
Next we find how long it takes to reach the top of its trajectory using vf=vo+at.
0ms=53ms+(−10ms2)t
t = 5.3s
Finally, find how high the object goes with d=vot+12at2.
d=(53ms)5.3s+12(−10ms2)(5.3s)2=140m
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Answer:
its
Explanation:
1.2m/×9m/s=10.8
ans=10.8m