Two masses collide and stick together. Before the collision one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?
a. Yes, if the less massive particle is the one initially at rest.
b. Yes, if the more massive particle is the one initially at rest.
c. Yes, if the two particles have the same mass.
d. No, kinetic energy is always lost is such a collision.
d
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A) It would require going back in time. B) It would require going faster than the speed of light. C) It would require deviating from the straightest possible path. D) It could be possible, but only if the universe has a spherical geometry.
Particles (mass of each = 0.40 kg) are placed at the 60-cm and 100-cm marks of a meter stick of negligible mass. This rigid body is free to rotate about a frictionless pivot at the 0-cm end. The body is released from rest in the horizontal position. What is the magnitude of the initial linear acceleration of the end of the body opposite the pivot?
A. 15 m/s2 B. 9.8 m/s2 C. 5.8 m/s2 D. 12 m/s2 E. 4.7 m/s2
The place where light is brought into focus (to form an image) in the human eye is called the
A) retina. B) optic nerve. C) lens. D) pupil. E) cornea.
Which of the following is not a characteristic of all the terrestrial planets?
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