The acceleration of an object as a function of time is given by a(t) = (3.00 m/s3)t, where t is in seconds. If the object is at rest at time t = 0.00 s, what is the velocity of the object at time t = 6.00 s?
A) 108 m/s B) 18.0 m/s C) 15.0 m/s D) 54.0 m/s E) 0.00 m/s
D
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If the Moon is setting at noon, then it rose at
A) 6 A.M. B) 9 A.M. C) noon. D) 6 P.M. E) midnight.
An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?
A. 8.0 m/s B. 9.6 m/s C. 12 m/s D. 6.9 m/s E. 0.20 m/s
Which of the following best describes the property of the period of orbital revolution for an Earth satellite?
a. greater when the orbital radius is smaller c. independent of the orbital radius b. greater when the orbital radius is larger d. determined mainly by the satellite's mass
A 1.2-kg mass is projected from ground level with a velocity of 30 m/s at some unknown angle above the horizontal. A short time after being projected, the mass barely clears a 16-m tall fence. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass as it clears the fence?
a. 0.35 kJ b. 0.73 kJ c. 0.40 kJ d. 0.68 kJ e. 0.19 kJ