Question

pls answer the question in the pic

Answer 1

apply mechanical energy conservation

1/2mv² = 1/2kx²

m=3 kg , v= 20 m s⁻¹,

k = 1200 N m⁻¹,

3 × 400 = 1200 × x²

x² = 1

x = 1 m

Answer 2

hi mate

here's your answer

hope this helps you

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