How to solve question 1? Rotational Motion Practice Test 1) Two large battleship

Question

How to solve question 1?

Rotational Motion Practice Test 1) Two large battleships, each with a mass of 1.2 x 10 kg (140,000 tons) are 100 m away from each other. What is the gravitational force of attraction between them? The moon is slowly moving further and further from the Earth. Suppose that in a billion years, it is 4 times as far away from the earth as it is now. By how much will the force of gravity between the earth and moon have changed? 2) Two masses are exerting 18 N of gravitational force on each other. If you move the masses so that they are 3 times as far away from each other, how much force will they exert on each other? 3) 4) Two mas ses that are 2 m apart exert 50 N of force on each other. How much force do they exert when they are 10 m apart? A pilot flying through a turn at 100 m/s experiences a centripetal acceleration of 40 m/s2. What would be his acceleration if he flies through the same turn at 200 m/s? What if he is flying at 100 m/s but the turn is tighter (half the radius)? 5) ra hall on 1 m long chain is whirled in a vertical circle at 5 m/s. What is

Explanation / Answer

1.

Gravitational force of attraction between them is given by

F=GM1M2/r2

F =(6.67*10-11)(1.2*108)(1.2*108)/1002

F=96.05 N

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