A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse it has received from the gravitational force is
a. 9.80 N s.
b. 19.6 N s.
c. 29.4 N s.
d. 58.8 N s.
e. 118 N s.
d
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What is the MOST important role that carbohydrates play in living organisms on Earth?
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A runaway railroad car, with mass 45.0 × 10^4 kg, coasts across a level track at 3.80 m/s when it collides with a spring-loaded bumper at the end of the track. If the spring constant of the bumper is 3.80 × 10^6 N/m, what is the maximum compression of the spring during the collision? (Assume the collision is elastic.)
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Two particles collide, one of them initially being at rest. Is it possible for both particles to be at rest after the collision?
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