Newton's Law states that no force is required to keep a moving object in motion. Why, then, do you have to pedal continuously to ride a bicycle along a flat road? ________ force
What will be an ideal response?
frictional
friction
drag
resistance
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In a pair of accelerating plates, such as found inside a CRT, the electrons are emitted
A) from the anode which is negative, toward the cathode which is positive. B) from the cathode which is negative, toward the anode which is positive. C) from the anode which is positive, toward the cathode which is negative. D) from the cathode which is positive, toward the anode which is positive.
If an unbalanced force of 8 N force acts on a 7-kg object, what is its acceleration?
a. 56 m/s2 b. 1.1 m/s2 c. 0.88 m/s2 d. 15 m/s2 e. cannot be determined
By what amount does the intensity level decrease when you triple your distance from a source of sound?
A) 9.5 dB B) 4.8 dB C) 6.0 dB D) 12 dB E) 3.0 dB
A 10,000-kg rocket blasts off from earth with a uniform upward acceleration of 2.00 m/s2 and feels no air resistance. The upward thrust force its engines must provide during this acceleration is closest to
A) 20,000 N. B) 980,000 N. C) 118,000 N. D) 78,000 N.