Question

- X 2045 NOTES IMAGES DISCUSS UNITS SIATS HELP Part Chk History Description Answer A horizontal force is applied to a 213 lb cart that is on a level surface. The cart starts from rest. The force initially is 54 lbs, and decreases over 8.2 seconds to 0 lb. Determine the initial acceleration of the cart. Ignore A: air resistance and friction. 2.48m/s^2 Force C: 8.163 ft/s^2 A # trics: 2 Show Details Hints: 0.0 (include units with answer) Determine the acceleration of the cart at t = 4.1 seconds. (include units with answer) A: 1.24m/s^2 C: 4.082 ft/s^2 + tries: 1 Show Details Hints: 0,0 Determine the velocity of the cart at A: 33.4ft/s t = 8.2 seconds. C: 33.47 (include units with answer) ft/s # tries: 5 Show Details Hints: 0,0 5pts. 60% Determine the velocity of the cart at t = 4.1 seconds. (include units with answer) 5.VIUS Form Chech #tries: 10 Show Details 2% try penalty 5:14 PM A ) 19 9/18/2019

Answer 1

v = u + at

initial velocity is zero, so, u = 0

acceleration at t = 4.1 = 1.24 m/s²

Therefore, velocity at t = 4.1 sec

v = 1.24 * 4.1

v = 5.084 m/s

or

v = 16.7 ft/sec