Class Management I Help lomework 5 Begin Date: 3/19/201 8 1 1 :59:00 PM-Due Date
ID: 2036034 • Letter: C
Question
Class Management I Help lomework 5 Begin Date: 3/19/201 8 1 1 :59:00 PM-Due Date: 4 920 18 1 1 50 00 PM End Date: 4? 2018 1 1 :50:00 PM (7%) Problem 4: A ball of clay ml 0.31 kg is thrown in the x direction with an initial velocity of v-21 m/s. It strikes a block of m 3.4 kg initially at rest and sticks. g 33% Part (a) write an expression for the system's final velocity v 33% Part (b) Assume the block had an initial velocity ofis in the positive x direction. Write an expression for the final velocit system Grade Su Submissia Attempts r 390 per at m2 NBACKSRACECLEAR Feedback gire up! Feedback: lfor a ihn deduction Submit Hint Hints: deduction per hint Hints remaining ber iraonuton Write carefully the momentum of the ystem before collition Now the block also has velocity and this should be taken into account in your fomula La ag 33% part (c) If the block has an initial relocity of vb- 2 m s what is the final velocity of the system in meters per second?Explanation / Answer
b) If the block had an initial velcoity, vb then
mcvc + mbvb = (mc + mb ) vf
where vc - velocity of clay, vb - velocity of block.
Remember, I have used c for clay, b for block. Please be careful the question gives mass of clay as m1 and mass of block as m2.
so, vf = mcvc + mbvb / mc + mb
c) Using the above expression , we have
vf = 0.31*21 + 3.4*3.2 / 0.31 + 3.4
vf = 4.687 m/s