Elastic force
Answers are for parents and teachers.
1
k = 25 N/m, Δl = 0.2 m. F (N)?
5
2
F = 10 N, Δl = 0.05 m. k (N/m)?
200
3
Give one everyday example each of elastic and plastic deformation.
Elastic: a spring; plastic: plasticine or clay.
4
By how many cm does a 5 N force stretch a spring with k = 100 N/m?
5
5
Why should you never release a stretched rubber band toward your face?
The elastic force snaps it back quickly and can hurt.