Question

30) The graph in Fig. 2-3 plots the velocity of two cars (A and B) along the same straight road. During the time interval shown, which car is AHEAD? A) Car A Car ย C) insuffilcient information 31) The graph in Fig. 2-3 plots the velocity of two cars (A and B) along the same straight road. Which car reverses direction? Car A C) insufficient information O) both cars A & B E) neither car A nor B 32) A car is able to stop in a distance d. Assuming the same braking force, what distance does th require to stop when it is traveling twice as fast? A) v2d B)d c) 22d D)4d E)2d 33) A can, after having been given a kick, moves up along a smooth hill of ice. It will Al have the same acceleration, both up the hill and down the hill. B have a varying acceleration along the hill. Ctravel at constant velocity D) have a constant acceleration up the hill, but a smaller constant acceleration when it comes the hill E) have a constant acceleration up the hill, but a larger constan the hil, back down t acceleration when it comes back down 34) When an abject is released from concerning its motion? A) Its acceleration is constant. B) Both its acceleration and its velocity are constant C) Its velocity is constant rest and falls in the absence of friction, which of the following is true D) Neither its acceleration nor its velocity is constant 35) When a ball s thrown straight up, which of the following is zero at its highest point? displacement B) acceleration C) velocity 36) When a ball is thrown straight up, the acceleration at its highest point is A)zero. B) horizontal C) minimum. D) upward. E) downward. 37) A ball is thrown straight up and returns to its starting point under an acceleration due to gravity. Which of the following is true? A) It took less time to rise than to fall. B) It took longer to rise than to fall. C) To compare rise and fall times we need to know the mass of the ball. t took the same time to rise as it took to fall. 38) A motorist travels for 3.0h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the trip? A) 70 km/h B) 140 km/h C)74 km/h D) 73 km/h E)69 km/h 39) A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip? A) 89 km/h B)91 km/h C)90 km/h D)60 km/h )84 km/h

which option is correct

Answer 1