Question 8, chap 6, sect 1. part 1 of 1 10 points The joule and the kilowatt-hou

Question

Question 8, chap 6, sect 1. part 1 of 1 10 points The joule and the kilowatt-hour are both units of energy. t How many joules are equal to 1 kilowatt- hour? Answer in units of J. Question 9, chap -1, sect -1. part 1 of 1 10 points A child's toy consists of a piece of plastic attached to a spring, as shown. The spring is compressed against the foor a distance of 2. cm and released. 1 cr ahval If the spring constant is 79 N/m, what is the magnitude of the spring force acting on the toy at the moment it is released? Answer in units of N.

Explanation / Answer

Spring constant k = 79 N/m ,

x = 2.1 cm =0.021 m
From Hooks law force F = kx
F = 79*0.021
F = 1.66 N

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