When two bodies of different masses collide, the impulses they exert on each other are
a. equal for all collisions.
b. equal but opposite for all collisions.
c. equal but opposite only for elastic collisions.
d. equal but opposite only for inelastic collisions.
e. equal but opposite only when the bodies have equal but opposite accelerations.
b
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Identical particles are placed at the 50-cm and 80-cm marks on a meter stick of negligible mass. This rigid body is then mounted so as to rotate freely about a pivot at the 0-cm mark on the meter stick. If this body is released from rest in a horizontal position, what is the angular speed of the meter stick as it swings through its lowest position?
A. 4.2 rad/s B. 5.4 rad/s C. 4.6 rad/s D. 5.0 rad/s E. 1.7 rad/s
If the mass of Venus is 0.786 times that of Earth, and its radius is 0.950 that of Earth, estimate the gravitational acceleration g at the surface of Venus. (gearth = 9.80 m/s2)
a. 7.31 m/s2 b. 3.73 m/s2 c. 8.27 m/s2 d. 8.53 m/s2
Temperature Scales: At what, if any, temperature are the numerical readings on the Fahrenheit and Celsius scales the same?
A. -30° B. -40° C. -50° D. -60° E. They can never read the same because they are based on different zeroes.
Simple Harmonic Motion: The total mechanical energy of a simple harmonic oscillating system is
A. zero as it passes the equilibrium point. B. zero when it reaches the maximum displacement. C. a maximum when it passes through the equilibrium point. D. a minimum when it passes through the equilibrium point. E. a non-zero constant.