A particle (m = 2.0 ?g, q = ?5.0 ?C) has a speed of 30 m/s at point A and moves (with only electric forces acting on it) to point B where its speed is 80 m/s. Determine the electric potential difference VA ? VB
a. ?2.2 kV
b. +1.1 kV
c. ?1.1 kV
d. +2.2 kV
e. +1.3 kV
c
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Fill in the blank(s) with the appropriate word(s).
How was the rotation rate of Jupiter's core determined?
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a. spring b. summer c. fall d. winter
Rotational Kinetic Energy: A solid uniform disk is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts up a ramp that makes an angle of 25° with the horizontal. What is the speed of the disk after it has rolled 3.0 m up as measured along the surface of the ramp?
A. 4.0 m/s B. 1.9 m/s C. 2.1 m/s D. 6.8 m/s E. 8.0 m/s