Objects with masses of 145kg and a 445kg are separated by, Ask an Expert

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Q1. Objects with masses of 145kg and a 445kg are separated by 0.330m. At what position (other than infinitely remote ones) can the 32kg object be placed so as to experience the net force of zero?

Q2. A 320 g air track travelling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 320 g cart after the collision?

Q3. A steel aircraft carrier is 375 m long when moving through the icy North Atlantic at a temperature of 2.0° C. By how much does the carrier lengthen while it is travelling in the warm Mediterranean Sea at the temperature of 23° C?

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