Answer Happy

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1. A heavy box containing four laptops worth 700,000 pesos is being delivered to Dukue. From the delivery van, it slides down on a rough ramp angled at 8 = 35.0 with respect to the ground. The coefficient of kinetic friction between the box and the ramp is uk = 0.350. If each laptop has a mass of 2.50 [kg], what is magnitude of acceleration of the box? A. 2.19 [m/s] B. 2.81 [m/s] C. 4.60 [m/s) D. 6.06 [m/s] 2. A car moving at constant speed to the right stops, then moves at constant speed to the left. Assuming right motion is positive, which of the following statements are TRUE about the car's instantaneous velocity during this motion? 1. Instantaneous velocity is ratio between car's displacement and time. II. Instantaneous velocity is positive when the car moves to the right. III. Instantaneous velocity is negative when the car moves to the left. A. I and II only C. II and III only B. I and III only D. I, II, ITI 3. A particle moving in one dimension has an initial velocity of v = -3.00 [m/s]ť and constant acceleration of a = -0.500 [m/s2j*i. Which of the following statements is/are true? 1. After t = 2.00 [s], the particle will be located 7.00 [m] to the left of its initial position. II. The particle is initially moving to the left. III. The particle is slowing down. A. I only C. I and II only B. II only D. I, II, III 4. Object m1 is attached to another object m2 by a taut string. Object m1 is moving down a rough funnel whilst object m2 moves straight down hanging freely. Determine which of the following pairs of forces are an action-reaction pair, 1. Frictional force on m1 and frictional force on the funnel II. Weight of m2 and tension exerted on m2 III. Tension exerted on m2 and force exerted by m2 on the string. IV. Tension exerted on m1 and frictional force on m1 m A. I and III only B. II and III only C. II and IV only D. III and IV only m2