Question

In order to get to work woman drove 8 miles non miles west. Determine: So work, a woman drove 8 miles north, 5 miles on (a) the total distance travelled (b) the total vector displacement (magnitude and direction) 7. A particle is subject to a force F which varies with position x, as shown in the diagram. Find the work done by the varying force from x=4 to x=12. [F is in Newtons; x is in meters] 8. A block of mass 7.0 kg is released from point 3 and slides on a frictionless track as shown. If h3 = 8 m, h2 = 3 m, and h = 5 m, Find: (a) the speed of the block at point 2 (b) the work done on the block from point 1 to point 3

Answer 1

23 ASTRO p á folal distance treivellel = 8+ 5+ 3 - 16 miles 512 W magnitude = 100*+100324 = [8+ 582_) 2+(3+5/8) 2 13.258 = tano = of 8+5142 BC 3+5182 temo = 1.765048937 o 1.0555.331 ned Horth of West les Scanneita 60.47759177 deg Yound CamScanner

ROLL (Ain @ total work done na not to x=2 Work done = fida a Ared under cure - fred (24 to 128) + ffrey ( 128 korte = 2XGX (2+5) + 1 X 4 X 5 = 14 +10 = 24 m Jules ® ® using work energy theorem initial potential energy + initial kinetic energy CS Scanned with Final potentiel energy + fine kinetic energen CamScanner

-mghz + 2m vir = tynghz ttum ve hore m= 7kg z = goginis ha =.om h2= 3m V = 0 (initial velocity) V = V₂ (Ainal velocity at point 2) 779.81x q to=A49-81 x 3 + 2 + (1.2 9.81(8-3) = 2 222 (N2)² = 249.81x5 Vra 9.81 +245 29.gos mic Scanned with: Seeds CamScanner

@ work done it only dere to goority wz F.pn = mg x (ha-hi) 2 749.8) X (8-5) = 779-81X3 = 206.0) Jacken CS Scanned with CamScanner