You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Frisbee. Ignoring air resistance, the torque exerted about its center of mass by gravity is
a. 0.
b. mgr.
c. 2mgr.
d. a function of the angular velocity.
e. small at first, then increasing as the Frisbee loses the torque given it by your hand.
a
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A net force of 450 N applied to a car results in the car accelerating at 0.360 m/s2. What is the mass of the car?
A) 162 kg B) 625 kg C) 12300 kg D) 1250 kg E) 1590 kg
A 3.0-kg mass sliding on a frictionless surface has a velocity of 5.0 m/s east when it undergoes a one-dimensional inelastic collision with a 2.0-kg mass that has an initial velocity of 2.0 m/s west. After the collision the 3.0-kg mass has a velocity of 1.0 m/s east. How much kinetic energy does the two-mass system lose during the collision?
a. 22 J b. 24 J c. 26 J d. 20 J e. 28 J
Exhibit 15-1
A dictator has built a bunker for his use in emergencies. Its dimensions are shown below. When it floods to ground level during a tropical storm, air is trapped above the dashed line in the bunker.
?
?
Use this exhibit to answer the following question(s).
Refer to Exhibit 15-1. The absolute pressure at point A, in Pa, is
A. 3.92 × 105. B. 4.90 × 105. C. 5.39 × 105. D. 5.88 × 105. E. 6.89 × 105.
The constellations in which the Sun appears over the course of each year are called
a. circumpolar stars b. circumsolar stars c. the constellations of the zodiac d. the tropical constellations e. solstice stars