T 7:39 OO AT&T; session masteringphysics.com C PHYS 202 Winter 2017 Jenkins Item

Question

T 7:39 OO AT&T; session masteringphysics.com C PHYS 202 Winter 2017 Jenkins Item 19 A 1.48 kg block is attached to a horizontal spring with spring constant 3450 N/m.The block is at rest on a frictionless surface.A 11.0 gbullet is fired into the block, in the face opposite the spring, and sticks. The subsequent oscilations have an amplitude of 11.1 cm Part A Find the total energy of the oscillator Express your answer using three significant figures. Submit My Answers Give Up Part B Find the speed of the bullet and block immediately after the collision Express your answer using three significant figures. Submit My Answers Give Up Part C Find the speed of the bullet just before it hits the block. Express your answer using three significant figures. Submit My Answers Give up

Explanation / Answer

a) Total energy = 0.5kx^2

= 0.5*3450*0.111^2

= 21.253 J

b)0.5(M+m)V^2 = 21.253

= 0.5*(1.48 + 0.011) v^2 = 21.253

v = 5.34 m/s

c) speed of the bullet before collision

mv = (M+m)V

0.011v = (1.48+0.011)*5.34

v = 723.73 m/s

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