The 4-N weight slides with negligible friction on a horizontal table. The spring attached to the weight has a stiffness of 20 N/m and a free length of 0.5 m. When the weight is at A, its velocity is 10 m/s directed as shown. Determine the speed of the weight at B where the length of the spring is 0.8 m. Also, find the rate at which the spring is elongating at B. Horizontal table 0.6 m 4 N 0.8 m 10 m/s B

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.