Question

<Assignment #5 (Ch 7 and Ch 8) Problem 8.61 35 of 36 II Review | Constants A rifle bullet with mass 8.00 g strikes and embeds itself in a block with a mass of 0.992 kg that rests on a frictionless, horizontal surface and is attached to a coil spring. (See (Figure 1).) The impact compresses the spring 15.0 cm. Calibration of the spring shows that a force of 0.600 N is required to compress the spring 0.300 cm Part A Find the magnitude of the block's velocity just after impact. Express your answer in meters per second to three significant figures. IVO AO ? 2.4 m/s Figure < 1 of 1 Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining K 15.0 cm Part B
PLEASE ANSWER A AND B AND INDICATE EACH ONE PLEASE

Answer 1

(A) The force constant is, F k = 0.60 0.30x10-2 = 200 N/m The magnitude if Block’s velocity after impact is, k V= -X m+m' = = 200 (0.15) 10.992 +0.008 = 2.12 m/s (B) The velocity of the bullet before collision is, m+m' V m' 0.992 +0.008 (2.12) 0.008 = 265 m/s Il = =