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/t 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.
e
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As the speed of a particle approaches the speed of light, the mass of the particle
A) increases. B) decreases. C) remains the same. D) approaches zero. E) approaches infinity.
A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit. How high is the fence?
a. 8.2 m b. 15.8 m c. 13.5 m d. 11.0 m e. 4.9 m
A stunt motorcyclist rides his motorcycle over a short ramp so that the motorcycle loses contact with the ground. As he does this, he guns his engine and the motorcycle's front wheel is observed to rise. Explain
What will be an ideal response?
A wave pulse traveling to the right along a thin cord reaches a discontinuity where the rope becomes thicker and heavier. What is the orientation of the reflected and transmitted pulses?
A) Both pulses are right side up. B) The reflected pulse returns right side up while the transmitted pulse is inverted. C) The reflected pulse returns inverted while the transmitted pulse is right side up. D) Both pulses are inverted.