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Help with Physics 2 parts Best awnswer! A 1.40 kg block is attached to a spring with spring constant 16 N/m?
A 1.40 kg block is attached to a spring with spring constant 16 N/m . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 48 cm/s .
Part A) What is the amplitude of the subsequent oscillations? (A=____cm)
Part B) What is the block's speed at the point where x=0.60A? (V=____cm)
1 Answer
- civil_av8rLv 74 years agoFavorite Answer
Use energy balance.
A) Initial KE = Final Spring PE
1/2*m*v_max^2 = 1/2*k*A^2
A = v_max*sqrt(m/k)
A = 14.2 cm
B) x = 0.60*A = 8.52 cm
initial KE = final KE + final spring PE
1/2*m*v_max^2 = 1/2*m*v^2 + 1/2*k*x^2
V = sqrt (v_max^2 - k/m*x^2)
V = 38.4 cm/s
