A force of 10 N causes aspring to extend by 20mm find the spring constant of the spring in N/m

10 =k x

and
x = 20 * 10^-3 meter
x = (10 /20)10^3 = .5 * 10^3 = 500 N/m

k = 10N /0.02m = 500 N/m.

THANKS FOR DAMON AND HENRY2

My response is study's

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10N/0.02M=500N/M

A force of 10 N causes a spiring to extend by 20 mm. Find the force applied that causes an extension of 5mm.

Information on the following information

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If deratu takes 15 minutes to complete 12 laps on the running track At adiss ababa stadium, what is her average speed if one lap is 450m long? What would her average velocity Be?