To steadily (constantly) increase the velocity of something requires a
A) steadily increasing force.
B) constant net force.
C) decreasing force.
D) none of the above
Answer: B
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Simple Harmonic Motion: The position of an object that is oscillating on an ideal spring is given by x = (17.4 cm) cos[(5.46 s-1)t]. Write an expression for the velocity of the particle as a function of time using the sine function.
What will be an ideal response?
T Tauri stars are never seen in old star clusters.
Answer the following statement true (T) or false (F)
Which of these is a result first obtained by Planck?
a. That energy is emitted continuously from each atom. b. That different materials used to construct the hollow block with a small hole emit different energy spectral distributions. c. That energy is emitted in discrete quanta. d. That light exists only as photons. e. That at high temperatures, electromagnetic radiation is more intense at shorter wavelengths.
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 mv 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