A horizontal force is applied to a 214 lb cart that is on a level surface. The cart starts from rest. The force initially is 98 lbs, and decreases over 9.6 seconds to 0 lb. Determine the initial acceleration of the cart. Ignore air resistance and friction. (include units with answer) A: 14.7 ft/s^2 C: 14.75 ft/s^2 Hints: 0,0

A50.0-n box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. you observe that at one instant the box is sliding to the right at and that it stops in 2.25 s with uniform acceleration. what magnitude force does friction exert on this box

An object is located 30.0 cm from a concave mirror. the focal length is 15.0 c,. what is the image distance? a. 30.0 cm b. -10 cm c. 10.0 cm d. -30.0 cm

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?