To catch a fast-moving softball with your bare hand, you extend your hand forward just before the catch and then let the ball ride backward with your hand. Doing this reduces the catching force because the
A) relative velocity is less.
B) relative velocity is more.
C) time of catch is increased.
D) time of the catch is decreased.
E) none of the above
Answer: C
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A particle (m = 3.0 ?g, q = 5.0 ?C) moves in a uniform magnetic field given by (
) mT. At t = 0 the velocity of the particle is equal to (
) m/s. The subsequent path of the particle is
A. circular with a 50-cm radius. B. helical with a 6.3-cm pitch. C. circular with a period of 31 ms. D. helical with a 40-cm radius. E. none of the above
Wiley Coyote has missed the elusive road runner once again. This time, he leaves the edge of the cliff at 52.4 m/s horizontal velocity. If the canyon is 140 m deep, how far from his starting point at the edge of the cliff does the coyote land?
a. 280 m b. 198 m c. 396 m d. 140 m e. 70.0 m
Two examples of a longitudinal wave are __________ and __________
Fill in the blank(s) with correct word
Is a nation's destiny determined by its demographics?
What will be an ideal response?