Chapter 2: Q20P (page 45)
(a) On a piece of graph paper, draw the vector , putting the tail of the vector at .Label the vector .
Short Answer
The graph of Vector with the Vector tail =
Chapter 2: Q20P (page 45)
(a) On a piece of graph paper, draw the vector , putting the tail of the vector at .Label the vector .
The graph of Vector with the Vector tail =
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Get started for freeIn a crash test, a truck with mass 2500kgtraveling at 24m/ssmashes head-on into a concrete wall without rebounding. The front end crumples so much that the truck is 0.72mshorter than before,
(a) What is the average speed of the truck during the collision (that is, during the interval between first contact with the wall and coming to a stop)?
(b) About how long does the collision last? (That is, how long is the interval between first contact with the wall and coming to a stop?)
(c) What is the magnitude of the average force exerted by the wall on the truck during the collision?
(d) It is interesting to compare this force to the weight of the tuck. Calculate the ratio of the force of the wall to the gravitational forceon the truck. This large ratio shows why a collision is so damaging.
(e) What approximations did you make in your analysis?
Question: A solid plastic sphere of radius R has charge -Q distributed uniformly over its surface. It is far from all other objects.
(a). Sketch the molecular polarization in the interior of the sphere and explain briefly.
(b). Calculate the potential relative to infinity at the center of the sphere.
In the circuit shown in Figure 19.75, the emf of the battery is . Resistor has a resistance of , and resistor has a resistance of. A steady current flows through the circuit. (a) What is the absolute value of the potential difference across ? (b) What is the conventional current through ?
Calculate the potential difference along the closed path consisting of two radial segments and two circular segments centred on the charge Q. Show that the four ΔV’s add up to zero. It is helpful to draw electric field vectors at several locations on each path segment to help keep track of signs.
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