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Q1. A spaceship travels with a constant speed of 0.3c as it passes by the earth on its way to a distant star.

a. the pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth

b. the pilot of the spaceship observes that the spaceship travels for 9 years. Conclude how much time has passed according to a person on earth.

c. sometime after passing the earth, the pilot shoots a laser pulse backward at a speed of 3x10^8 meters per second with respect to the spaceship. Find out the speed of the laser pulse as measured by a person on earth

Q2. An air-track glider attached to a spring oscillates between the 12.0 cm mark and the 71.0 cm mark on the track. The glider completes 7 oscillations in 39.0s. What are (a) period, (b) frequency, (c) amplitude, and (d) maximum speed of the glider?

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Category:- Physics
Reference No.:- M9135313

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