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course Phy 121
If an airplane is flying north, from what direction would the wind be blowing to most effectively cause the aircraft to veer toward the east? What sort of path would it follow for the first second or so?
answer/question/discussion:
Wind blowing from the west would most effectively cause the plane to veer east. It would travel in an arc, curving towards the east.
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If the wind keeps shifting so as to remain perpendicular to the direction of motion what path will the airplane follow?
answer/question/discussion:
It would keep veering in an arc and eventually complete a circle.
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&#Very good responses. Let me know if you have questions. &#
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course Phy 121
A steel ball of mass 60 grams, moving at 80 cm / sec, collides with a stationary marble of mass 20 grams. As a result of the collision the steel ball slows to 50 cm / sec and the marble speeds up to 70 cm / sec. Is the total momentum of the system after collision the same as the total momentum before?
answer/question/discussion:
Total Momentum Before Collision:
p_total=M1*V1+M2*V2
p_total=.06kg*.8m/s+.02kg*0m/s
p_total=.048kg*m/s
Total Momentum Before Collision:
p_total=M1*V1+M2*V2
p_total=.06kg*.5m/s+.02kg*.7m/s
p_total=.044m/s^2
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What would the marble velocity have to be in order to exactly conserve momentum, assuming the steel ball's velocities to be accurate?
answer/question/discussion:
.048m/s =M1*V1+M2*V2
.048m/s=.06kg*.5m/s+.02kg*V2
v2=(.048m/s-.06kg*.5m/s)/(.02kg)
v2=.9m/s
&#Very good responses. Let me know if you have questions. &#