If I drop a golf ball and a bowling ball simultaneously from same height above the ground, what will happen? Neglect the effects of wind or air resistance
A) The golf ball will hit the ground before the bowling ball.
B) The bowling ball will hit the ground before the golf ball.
C) The golf ball and the bowling ball will hit the ground at the same time.
C
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Springs: The graphs shown show the magnitude F of the force exerted by a spring as a function of the distance x the spring has been stretched. For which one of the graphs does the spring obey Hooke's law?
A. Graph a B. Graph b C. Graph c D. Graph d E. Graph e
A common experience is to find that a steady pull is required to keep an object moving, even on a level surface, when friction is present. Analyzing this experience in light of the laws of motion, the accepted conclusion is that
A. the laws of motion do not apply where there is friction. B. the laws of motion only apply when you start pulling or stop. C. the object is really accelerating but it is not apparent. D. your pull is canceled by the third law reaction force. E. a frictional force exactly opposes your pull and the first law applies.
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is
a. 0 d. 5 m/s2 b. 2 m/s2 e. 7.5 m/s2 c. 4 m/s2
The observed acceleration of the expansion of the Universe is evidence that some form of energy, either a cosmological constant or quintessence, is spread throughout space
Indicate whether the statement is true or false