A 2.00-m rod of negligible mass connects two very small objects at its ends. The mass of one object is 1.00 kg and the mass of the other is unknown
The center of mass of this system is on the rod a distance 1.60 m from the 1.00-kg mass object. What is the mass of the other object?
A) 0.800 kg B) 4.11 kg C) 3.22 kg D) 0.250 kg E) 4.00 kg
E
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You would like to buy a full-length mirror which allows you to see yourself from head to toe. The minimum height of the mirror is
A. half your height. B. two-thirds of your height. C. equal to your height.
A typical avocado has 180 Calories. If all this energy could be used to lift a bucket of water weighing 40 N, through what vertical distance could the bucket be lifted? (1 calorie = 4.184 J and 1 Calorie = 103 calories)
a. 1.72E+6 m b. 3.01E+7 m c. 7.53E+5 m d. 1.88E+4 m
The energy in the Sun's core is produced by
A. the chemical reaction of hydrogen and helium. B. the release of gravitational potential energy. C. the fusion of hydrogen to helium. D. radioactive decay.
A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a 5.0-kg object initially at rest. After the collision the 5.0-kg object has a velocity of 6.0 m/s in the positive x direction. What was the initial speed of the 3.0 kg object?
a. 6.0 m/s b. 7.0 m/s c. 4.5 m/s d. 8.0 m/s e. 5.5 m/s