Part A The position of a 40g oscillating mass is given by x(t) = (2.0 cm) cos(10

Question

Part A The position of a 40g oscillating mass is given by x(t) = (2.0 cm) cos(10t), where t is in seconds Determine the velocity at t = 0.40 s. Express your answer in meters per second to two significant figures. Vx= m/s Part B Assume that the oscillating mass described in Part A is attached to a spring What would the spring constant k of this spring be? Express your answer in newtons per meter to two significant figures. K= N/m Part C What is the total energy E of the mass described in the previous parts? Express your answer in joules to two significant figures. E=J

Explanation / Answer

A
v(t) = 20sin(10t)
so,
V = -15.14 cm/s = -0.15 m/s

B 4.0 N/m

C 8.0*10^-4 Joule

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