Q7: An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.0 s after firing. What are the x and y coordinates of the shell where it explodes, relative to its firing point?
Q7: An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.0 s after firing. What are the x and y coordinates of the shell where it explodes, relative to its firing point?
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Transcribed Image Text:Q7: An artillery shell is fired with an initial velocity of 300 m/s at 55.0°
above the
horizontal. It explodes on a mountainside 42.0 s after firing. What are
the x and y
coordinates of the shell where it explodes, relative to its firing point?
Q8: A student attaches a ball to the end of a string 0.6 m in length and
then swings
the ball in a vertical circle. The speed of the ball is 4.30 m/s at its
highest point and
6.50 m/s at its lowest point. Find the acceleration of the ball when the
string is
vertical and the ball is at (a) its highest point and (b) its lowest point.
Q9: Determine the stopping distance for a skier moving down a slope
with friction
with an initial speed of 20.0 m/s. Assume kinetic friction to be 0.18 and
e = 5.0°.
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