Two 1 kg masses are located on the x axis at x = -1.0, and 2 kg masses are locat

Question

Two 1 kg masses are located on the x axis at x = -1.0, and 2 kg masses are located at x = 2.3 meters. Where along the x-axis is the center of mass of the system relative to the y axis shown? -1 1 1.5 2.5 Sound has a sound level of 10,000 times the threshold of human hearing. What is the decibel level of the sound? 10 db 100 db 10,000 db 5 db 40 db A block with a mass M = 1kg is attached to a spring with a constant k = 100 N/m, stretched 0.1 m and released. What is the maximum velocity of the block? 1 m/s 10 m/s 20 m/s 50 m/s 100 m/s When the mass of a simple pendulum is tripled, the time required for one complete vibration _______ and when the mass on a spring is tripled the time for one complete oscillation _________. increases by a factor of 3: does not change does not change: increases by a factor of squareroot 3 decreases to one-third of its original value, increases by a factor of 3 decreases to 1/squareroot 3 of its original value, increases by 1/squareroot 3 of it s original value increases by a factor of squareroot 3; decease by a factor of squareroot 3 It Is found that on planet x a simple pendulum of length 1 meter has a period of exactly 1 second.. What is the value of g on this planet in m/s/s? 1.67 10 20 30 40 An object undergoes SHM and position as a function of time is presented by the following formula: x= (0.1 m) Sin (4 pi t). What is the period of oscillations? 2 s 1 s 0.5 s 0.1 s pi s

Explanation / Answer

here,

11)

m1 = 1 kg

m2 = 2 kg

x1 = - 1 m

x2 = 2.3 m

the centre of mass , x = ( m1 * x1 + m1 * 0 + m2 * x2 + m2 * 2 * x2)/(2m1 + 2m2)

x = ( - 1 * 1 + 1 * 0 + 2 * 2.3 + 2 * 2 * 2.3)/(2 * 1 + 2 * 2)

x = 2 m

the centre of mass is at D) 2 m

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