Phy 201
Your 'cq_1_19.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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Sketch a vector representing a 10 Newton force which acts vertically downward.
• Position an x-y coordinate plane so that the initial point of your vector is at the origin, and the angle of the vector as measured counterclockwise from the positive x axis is 250 degrees. This will require that you 'rotate' the x-y coordinate plane from its traditional horizontal-vertical orientation.
answer/question/discussion: ->->->->->->->->->->->-> :
x component = -3.4 N
y component = -9.4 N
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• What are the x and y components of the equilibrant of the force?
answer/question/discussion: ->->->->->->->->->->->-> :
x component = 3.4 N
y component = 9.4 N
#$&*
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5 minutes
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seed 18.2
A child in a car tosses a ball upward so that after release it requires 1/2 second to rise and fall back into the child's hand at the same height from which it was released. The car is traveling at a constant speed of 10 meters / second in the horizontal direction.
Between release and catch, how far did the ball travel in the horizontal direction?
answer/question/discussion: ->->->->->->->->->->->-> :
'dt= .5
vave= 10m/s
'ds= .5s * 10m/s=5m
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As observed by a passenger in the car, what was the path of the ball from its release until the instant it was caught?
answer/question/discussion: ->->->->->->->->->->->-> :
The path was the ball went up vertically and toward the child horizontally against the motion of the car, slowed until it came to rest and started to come back down unitl it was caught by the child.
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Sketch the path of the ball as observed by a line of people standing along the side of the road. Describe your sketch. What was shape of the path of the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
my sketch has a kind of bell shaped curve that goes up vertically and over in the negative direction horizontally and then back down, kind of an upside down backwards u shape
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How fast was the ball moving in the vertical direction at the instant of release? At that instant, what is its velocity as observed by a line of people standing along the side of the road?
answer/question/discussion: ->->->->->->->->->->->-> :
'dt=.5s
a= 9.8m/s^2
vo= 0
vf= v0 + a * 'dt
vf= 0 + 9.8m/s^2 * .5s
vf=49m/s
#$&*
How high did the ball rise above its point of release before it began to fall back down?
answer/question/discussion: ->->->->->->->->->->->-> :
'ds= 49m/s/2 * .5s
'ds=12.25m
#$&*
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20mins
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&#Your work looks good. See my notes. Let me know if you have any questions. &#