Module 2 Unit Test Physics 1401 Question 1 A 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 55 o above the x axis What was the magnitude of the acceleration of the spaceship during the 25 seconds Select one a 28 m s s b 1 5 m s s c 48 m s s d 7 3 m s s e 57 m s s Question 2 When 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 kg b 0 25 kg c 2 5 kg d 5 0 kg e 2 0 kg Question 3 A 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 3 b 1 and 4 c 1 and 2 d 3 and 4 e 2 and 4 Question 4 The 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 s c 8 75 s d 4 22 s e 10 4 s Question 5 A 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 6 A 71 kg man stands on a bathroom scale in an elevator What does the scale read if the elevator is ascending with an acceleration of 3 0 m s s Select one a 690 N b 480 N c 910 N d 140 N e 830 N Question 7 A 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 m c 10 m Question 8 If the speed of a record player remains constant while your pet hamster moves twice as far from the center the its linear speed Select one a Remains the same b Halves c Doubles Question 9 Compared to the mass of a certain object on earth the mass of the same object on the moon is Select one a more b the same c less Question 10 A 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 N b 6 N c need more information to say d less than 6 N Question 11 A 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 the Select one a regular ball b same for both c lead filled Question 12 A 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 Beetle d Truck Question 13 An 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 5209 Question 14 A fairground ride spins its occupants inside a flying saucersnapped 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 rev min
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