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Phy 201
Your 'cq_1_13.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_13.1_labelMessages **
A ball rolls off the end of an incline with a vertical velocity of 20 cm/s downward, and a horizontal velocity of 80 cm/s. The ball falls freely to the floor 120 cm below.
For the interval between the end of the ramp and the floor, hat are the ball's initial velocity, displacement and acceleration in the vertical direction?
v0=20 cm/s, ds=120 cm, a=980 cm/s^2 #$&*
What therefore are its final velocity, displacement, change in velocity and average velocity in the vertical direction?
vf=sqrt(20 cm/s)^2+2(980 cm/s^2)*120 cm=485.39 cm/s
ds=120 cm
change in velocity=485.39 cm/s
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This is the final velocity, not the change in velocity.
*@
average velocity=242.7 cm/s
dt=120 cm/242.7 cm/s=.49 s #$&*
What are the ball's acceleration and initial velocity in the horizontal direction, and what is the change in clock time, during this interval?
acceleration is 0
horizontal velocity is 80 cm/s
change in clock time is .49 s
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