An object on the flat bed of a truck that is accelerating along a straight horizontal road. The coefficient of static friction is 0.300 in this case. Of the following choices, which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?
a. 0.280 m/s2
b. 0.310 m/s2
c. 2.93 m/s2
d. 2.99 m/s2
e. 3.02 m/s2
d
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If your heart is beating at 76.0 beats per minute, what is the frequency of your heart's oscillations in hertz?
A) 2.54 Hz B) 3.98 Hz C) 4560 Hz D) 1450 Hz E) 1.27 Hz
A single conservative force Fx = (6.0x - 12) N (x is in m) acts on a particle moving along the x axis. The potential energy associated with this force is assigned a value of +20 J at x = 0 . What is the potential energy at x = 3.0 m?
a. +11 J b. +29 J c. +9.0 J d. -9.0 J e. +20 J
Why do astronomers believe that Triton is a captured moon?
A) Triton is very small and potato-shaped, which is common of captured moons. B) Triton is too large to have been formed in the "miniature solar nebula" thought to have surrounded Neptune in its very early history. C) Triton appears to be made mostly of ice. D) Triton orbits Neptune in a direction opposite that of Neptune's rotation.
Precession is the slow change in direction of Earth's rotation axis due to the gravitational interaction of the Sun and of the Moon with Earth's equatorial bulge.
Answer the following statement true (T) or false (F)