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Unformatted text preview: Name: ' Section: & LU /l\ Col SSN: EGN 3321: DYNAMICS
FALL 2001
EXAM #1 l. (30 points) A ball is dropped onto a step at point A and rebounds with a velocity v0 at an angle of
15° with the vertical. Determine the value of vo knowing that just before the ball
bounces at point B its velocity VB forms an angle of 12 ° with the vertical. NOTE: The difference in height between points A and B is given! The horizontal distance between the two points is not needed in solving the problem! «3? i A: We 42“”, 31 N3 (‘20 8., 1 v0.2!» $2050): %W<‘°2'V53E71° (I)
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Each of the systems shown is initially at rest. Neglecting axle friction and the masses
of the pulleys, determine for each system: (A) the acceleration of block A, (B) the velocity of block A aﬁeir it has moved through 10 ft. (.22...) T+\X/A,=_mkak {WI rams 5) N2¢W +2aL ' >
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m ”W5+ ' ‘ ”‘60” 1%on u .453 3. (30 points) A satellite will travel indeﬁnitely in a circular orbit around a planet if the normal
component of the acceleration of the satellite is equal to g(R/r)2 , where g is the
acceleration of gravity at the surface of the planet, R the radius of the planet, and r is
the distance from the center of the planet to the satellite. Determine the speed of a
satellite relative to the indicated planet if the satellite is to travel indeﬁnitely in a
circular orbit 160 km above the surface of planet Venus: g = 8.53 III/s2, R = 6161 km. 598.53 cal/51
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 Fall '02
 IrinaIonescu

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