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49 When a certain net force is applied to one brick on a frictionless surface, it accelerates at 6 m/s^2. When the same net force is applied to two bricks that are cemented together, * (2 Points) they do not accelerate at all. ( they accelerate at 3 m/s^ 2 they accelerate at 6 m/5^ 2. they accelerate at 12 m/5^2. 50 Wires that are. have lower resistance. * (2 Points) longer and thinner longer and thicker shorter and thinner shorter and thickerWhich of the following statements is true? For the junction in the network shown in the figure? * (2 Points) 11 12 13 15 12 + 13 + 15 = 11 + 14 11 + 12 + 13 = 14 + 15 11 -12-13 -14 + 15 =0 15 -14 = 13 -12 + 19 40 You have a 2000 kg car that can produce 300,000 Watts. You use it at this power to accelerate from 10 m/s to 20 m/s. How long will this take? * [(2 Points) 1.0 second 2.0 seconds 3.4 seconds O 4.7 secondsA charge of 6uC at the origin experiences a force of 1.8M in the positive ydirection due to a negative charge located 0.30m away. The magnitude of the unknown charge is * {2 Points} 0 0.018nC 0 mac 2" a8 Kirchhoff's Second Law states: * {2 Poi nts} O The sum of the potential differences is dependent on the route taken by the current. 0 Sum of the potential differences is less than the battery voltage. 0 The sum of potential differences throughout the circuit adds up to zero. but only if the components are in series. 0 The sum of potential differences throughout the circuit adds up to zero. regardless of the route taken. III '__I- .J r. The condition or state in wherein a body is at rest or is moving in uniform motion. * {2 Points} 0 equilibrium Which of the following statements demonstrate a greater power? * [2 Points} 0 Another person who can perform the same work for 4 hours. 0 A person who can do work in 2 hours. 0 A machine doing the same work for 2.5 hours. 0 A person using a machine and finishing the same work in 3 hours