A 1.2 kg mass attached to a spring oscillates with, Ask an Expert

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Q1. A 1.2 kg mass attached to a spring oscillates with amplitude of 6.3 cm and a frequency of 1.1 Hz. What is its energy of motion?

Q2. Blocks with masses of 2.0 {rm kg}, 6.0 {rm kg}, and 9.0 {rm kg} are lined up in a row on a frictionless table. All three are pushed forward by a 20 {rm N} force applied to the 2.0 {rm kg} blocks. How much force does 6.0 {rm kg} blocks exert on the 9.0 {rm kg} blocks?

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