apri igiearning.com/ibiscms/mod/ibis/view.php?id=5081 692 University of A ing of
ID: 1584367 • Letter: A
Question
apri igiearning.com/ibiscms/mod/ibis/view.php?id=5081 692 University of A ing of Arkansas-Little Rock-PHYS 2321- Spring18-CHEN > Activities and Due Dates HW: Work and Kinetic Energ o 3/9/2018 06:00 PM O 61.7/1003/6/2018 02:46 PM Print Caliator led Perede Table Gra Question 4 of7 Sapling Learning A block of mass m 353 g is dragged with a string across a rough horizontal table. The string tension is T= 3.43 N, and it puts upward at an agle of particular instant the blockis moving at a speed of v = 5 10 m/s. The coefficient of kinetic friton between the block and the table isik 0699. $1430"with the horizontal At one What is the power supplied to the block by the string tension? Number What is the power supplied by the force of friction? T-343 Number -5.t0 mis At this instant the block's speed is decreasing constant 43,06 353 mpossible to determineExplanation / Answer
power supplied to the block by the string
P1 = T*v*cosphi = 3.43*5.1*cos43 = 12.8 W
==============================
power supplied by by the force of friction
P2 = f*v*cos180
f = frictional force =uk*m*g
P2 = -uk*m*g*v
P2 = -0.699*0.353*9.8*5.1
P2 = -12.3 W
======================
increasing
p1 > P2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.