Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The quantity Fd is
a. the kinetic energy of the crate.
b. the potential energy of the crate.
c. the linear momentum of the crate.
d. the work you do on the crate.
e. the power you supply to the crate.
d
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In cold weather, your hands will be warmer if you wear
A) gloves. B) mittens. C) both the same
On the day of the Autumnal Equinox and on the of the Vernal equinox the length of the daylight hours and nighttime hours are equal for everyone on Earth.
a. true b. false
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg?m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg?m2, what is the final angular speed?
A) 2.25 rad/s B) 4.60 rad/s C) 6.25 rad/s D) 1.76 rad/s E) 0.81 rad/s
If you wish to send a beam of laser light from Earth to a space station above the atmosphere near the horizon, aim your laser
A) above your line of sight. B) below your line of sight. C) along your line of sight.