For general projectile motion with no air resistance, the vertical component of a projectile's acceleration
A) is always zero.
B) remains a non-zero constant.
C) continuously increases.
D) continuously decreases.
E) first decreases and then increases.
B
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A) frequency. B) period. C) speed. D) all of the above E) none of the above
When a spinning ice skater pulls in his arms, he spins faster because
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If 480 C pass through a 4.0-W resistor in 10 min, what is the potential difference across the resistor?
a. 3.6 V b. 2.8 V c. 2.4 V d. 3.2 V e. 5.0 V
During takeoff a jet aircraft goes from 0 m/s to 60 m/s in 5 seconds. (a) What is the jet's acceleration? (b) What is the jet's speed after 22 seconds?