A particle (charge = +2.0 mC) moving in a region where only electric forces act on it has a kinetic energy of 5.0 J at point A. The particle subsequently passes through point B which has an electric potential of +1.5 kV relative to point A. Determine the kinetic energy of the particle as it moves through point B
a. 3.0 J
b. 2.0 J
c. 5.0 J
d. 8.0 J
e. 10.0 J
b
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A roller coaster starting from rest descends 35 meters in its initial drop and then rises 23 meters when it goes over the first hill, which has a circular shape over the top
If a passenger at the top of the hill feels an apparent weight equal to one-half of her normal weight, what is the radius of curvature of the first hill? Neglect any frictional losses.
The most basic and irrefutable proof that energy cannot be created out of nothing or completely destroyed is that
a. Newton's laws of motion require it. b. no proof is necessary. Energy is energy. c. no experiments have ever proved the contrary. d. the Sun would long since ceased to shine. e. it would contradict Einstein's relativity.
A spaceship, traveling at 0.560c towards a stationary space platform, launches a secondary towards the station with a speed of 0.100c relative to the spaceship. What is the speed of the secondary rocket relative to the space platform?
A) 0.460c B) 0.575c C) 0.600c D) 0.625c E) 0.660c
A long cylindrical conductor (radius = 1.0 mm) carries a charge density of 4.0 pC/m and is inside a coaxial, hollow, cylindrical conductor (inner radius = 3.0 mm, outer radius = 4.0 mm) that has a total charge of -8.0 pC/m. What is the magnitude of the electric field 2.0 mm from the axis of these conductors?
a. 24 N/C b. 18 N/C c. zero d. 36 N/C e. 226 N/C