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TAMU PHYS 1401 - Module 2 Unit test

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Module #2 – Unit TestPhysics 1401 Question 1A spaceship is observed traveling in the positive x direction with a speed of 150 m/s when it begins accelerating at a constant rate. The spaceship is observed 25 s later traveling with an instantaneous velocity of 1500 m/s at an angle of 55oabove the +x axis. What was the magnitude of the acceleration of the spaceship during the 25 seconds?Select one:a. 28 m/s/sb. 1.5 m/s/sc. 48 m/s/sd. 7.3 m/s/se. 57 m/s/s Question 2When the net force that acts on a hockey puck is 12 N, the puck accelerates at a rate of 48 m/s/s. Determine the mass of the puck.Select one:a. 1.0 kgb. 0.25 kg c. 2.5 kgd. 5.0 kge. 2.0 kgQuestion 3A book is resting on the surface of a table. Consider the following four forces that arise in this situation: 1. the force of the earth pulling on the book, 2. the force of the table pushing on the book, 3. the force of the book pushing on the table, 4. the force of the book pulling on the earth. Which two forces form an "action-reaction" pair that obeys Newton's third law?Select one:a. 1 and 3b. 1 and 4c. 1 and 2d. 3 and 4e. 2 and 4Question 4The wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s. If the coefficient of kinetic friction is 0.600 and the road is horizontal, approximately how long does it take the car to stop?Select one:a. 5.10 s b. 15.3 sc. 8.75 sd. 4.22 se. 10.4 sQuestion 5A 4-kg block is connected by means of a massless rope to a 2-kg block that is hanging over the edge of a table. The rope is threaded through a pulley that extends out over the edge of the table. Complete the following statement: If the 4-kg block is to begin sliding, the coefficient of static friction between the 4-kg block and the surface must be (don't forget about the inertia of both blocks):Select one:a. greater than 1, but less than 2.b. greater than 0.5, but less than 1.c. greater than 2.d. less than zero.e. less than 0.5, but greater than zero. Question 6A 71-kg man stands on a bathroom scale in an elevator. What does the scale read if the elevator is ascending with anacceleration of 3.0 m/s/s?Select one:a. 690 Nb. 480 Nc. 910 Nd. 140 Ne. 830 NQuestion 7A stone is thrown horizontally from the top of a cliff. One second after it has left you hand its vertical distance below the cliff is Select one:a. 5 m b. 15 mc. 10 m Question 8If the speed of a record player remains constant while your pet hamster moves twice as far from the center, the its linear speedSelect one:a. Remains the sameb. Halvesc. Doubles Question 9Compared to the mass of a certain object on earth, the massof the same object on the moon isSelect one:a. moreb. the same c. lessQuestion 10A block is dragged without acceleration in a straight line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?Select one:a. more than 6 Nb. 6 N c. need more information to say.d. less than 6 NQuestion 11A pair of tennis balls fall through the air from a tall building. One ball is regular and the other is filled with lead pellets. The ball to reach the ground first is theSelect one:a. regular ballb. same for bothc. lead filled Question 12A Mack truck and a Volkswagon Beetle traveling at the same speed collide head-on. The impact force is greatest on the Select one:a. Not enough information is given.b. is the same for both. c. Beetled. TruckQuestion 13An ordinary workshop grindstone has a radius of 9.50 cm and rotates at 7000.0 rpm. Calculate the centripetal acceleration at its edge in m/s/s and convert it to multiples of g. Answer: 5209Question 14A fairground ride spins its occupants inside a flying saucer-snapped container, If the horizontal circular path the riders follow has an 8.00 m radius, at how many revolutions per minute will the riders be subjected to a centripetal acceleration whose magnitude is 1.50 times that due to gravity?Answer: 12.9


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TAMU PHYS 1401 - Module 2 Unit test

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