4A 15 N force is applied to a 5.0 kg block as shown. What is the normal force on the block? a 15 N _15N b 34N _|_5 kg_|_ c 49 N d- 64N 12 which of the following best illustrates the electric field between parallel plates with opposite electric charge ? 5A light cord connects a moving car t to a mass over a pully as shown. If the cart is accelerating at 2.3 m/sz, what is its mass? a 2.8 kg b 3.5 kg c- 4.9 kg d 6.4 kg 8- AS a skier descends a slope, her kinetic energy increases from 600 J to 3200 J while her gravitational potential energy decreases by 5900j. How much heat energy is created due to friction? a- 2100 J b- 3300 J c- 8500 J d- 9700 J9- How much work must be done to stop an 1800 kg vehicle traveling at 30 m/s ? a- 1.8 x 104 J b- 5.4 x 104j c- 5.3 x 105J d- 8.1 x105 J 10- you are a passenger in a car making a right turn on level ground. The direction of the instantaneous velocity is north. The direction of the centrifugal force you feel is. a- West b- Northwest c- North d- Northeast1 Which of the following is a vector quantity? a Work b- Electric field c Potential energy d Potential difference 2 A red ball is launched from level ground with an initial velocity of 28 m/s . 40 degree above the horizontal. How far above the ground is the ball 2.0 5 later? a 16m b 23m c 36m d 56m 3The gravitational field strength of the earth at its surface is best a 9.8] b 9.8 kg.m/s2 c 9.8 ng d 9.8 N/kg 11 A twodimension collision occurs as shown below. More m com-gm 9W ll, admin P Q 0'\" Eb in. Which vector below most closely represents the new velocity of P? aA bB cC dD eE '01 13 .'___, E D~ \\' 15 The electric filed is uniform between a Two positive point charge b Two negative point charge c- Two opposite point charges d Two oppositely charged parallel plates. 13' which of the following best describes how electric potential varies _'_with distance in the region around a point charge? a V = r b V=1/r c V=r2 d V: 1/r2 14Three identical positive electric charge are fixed as shown in the diagram below. What is the direction of the net electric force on deuet to Q1 and Om Q3 :1 $ A. To the left 0% J Q6 __a B. To the right C. The net force is zero D. Cannot be determined 8 Two forces act on an object as shown in the diagram 1': F. Which of the following best shows the resultant R of these forces? 6 A skier accelerates uniformly from 5.2 m/s to 12.8 m/s at 0.85 m/sZ. Find the distance she travels. a 7.7 m b- 8.9 m c 11 m d 80 m 7 Which of the following statement concerning vector and scalar quantities is incorrect? a All scalar quantities have direction. b All vector quantities have direction. c All scalar quantities have magnitude. d All vector quantities have magnitude