2. a 4.0 kg ball moving to the right at 1.2 m/s collides inelastically with a 1.0 kg ball at rest. what will the velocity of the combined balls be after the collision?
3. an object is lowered into a deep hole in the ground. how does the potential energy of the object change?
4. a real spring does not oscillate forever. instead, it eventually comes to a stop. does this violate the law of conservation of energy? explain why or why not.
5. a boy can raise a rock that weighs 100 n by using a lever and applying a force of 20 n. what is the mechanical advantage of the lever?
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Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?
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Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.
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2. a 4.0 kg ball moving to the right at 1.2 m/s collides inelastically with a 1.0 kg ball at rest. w...
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