In an inertial reference frame Select one: O a. because the frame has all of the inertia, the objects have no inertia O b. the reference frame is accelerating. demonstrating its inertia O d. Newton's three laws are valid but not apparent A 100 N object sits on a table and is tupped forwards and backwards by forces F, = 1000 N and Fa . 1500 N. as shown. (tuthe that the vectors are not drawn to scale ) There me scale ) There are no other forces acting on the object. What is the magnitude of the normal force, F.? 100 N Select one: a. 1000 N O b. 100 N O c. 1500 N O d. 400 N Which of the following state Select one wo surfaces from siding across one another is called static friction. The force of state friction ( ",) between parallel surfaces in contact is given by: r, " upv. matic friction is the force which acts to stop two surfaces from siding past one another. ction acts opposite to the direction of motion and is expressed by the following equations . " AUN. A cart with mass my " 24 kg lies on an incline that makes an angle of 17" with the horizontal. The coefficients of static and kinetic friction are 0.7 and 0.5 respectively. The cart is tied by an ideal rope that runs through a frictionless puley as shown in the diagram, what tension do you need to apply to the free end of the rope in order to make the cart go up the incline at a constant velocity? Select one: O a. 181 N O b. 333 N c. 289 N O d.57N O e. None of the above Which is not a reason why measurements are im O a. They allow us to make quantitative statement O b. They allow us to incorporate mathematics imo physics O c. They giveu d. They allow us to indirectly compare different physical situations. A jet travels 1000 m down a runway for take off. It starts from rest and me heration. It in in the air in 36 s. What is its speed when it takes off? Select one a. 7.2m/s O b. 14 m/s c. 26 m/s O d. $5.6 m/s A vector is quardity that requires both magnitude a O a lenge O b. force O c. the metric system O d direction You are in a mall and are hurrying to get to the candy store before it closes. You walk on an escalator to speed up your progress. The escalator is going 0.7 m/s and it is 20 m long. You walk on the escalator at a site of 2.6 m/'s. Assuming you would have walked at the same speed on the stairs, how much time did you gain by out he did you gain by getting on the escalator? Select one a. 20 s b. 2.2 O c. 1.6 5 D d 485 An amusement park game consists of throwing a quarter into a small bowl if you win, you get to take home a giant purple stuffed elephant. The Gish is on a shelf that is 0.4 m above the point where the quarter leaves your hand. The horizontal distance between the bowl and the place where the quarter leaves your hand is 1.8 m. Ignoring air drag, if you toss the quarter at an angle of 50'. what initial velocity is needed to bring home the giant purple stuffed elephant? Select one: a. 24 m/s O b. 23.5m/5 O c. 4.8m/s O d 0.75m/s In a traffic accident, two motorcycles, A and B. collide with each other. Their total masses are 180 kg and 134 kg. If the more massive one experiences an acceleration of 50 mysz welcome with ear 3 m/c. what is the acceleration of the other motorcycle? Select one a.0.01 m/s O b. 67m/ O e. 37m/s' Od 55m/s In space. far away from any planets, which of the follow reuntest force to accelerate? Select one a Megaship, the large and powerful, with a mass of 10 million kg b. the 100 big Interstellar Child Scooter c. the sleek and aerodynamic 10,000 kg Speedstar O'd none of the other choices as things are weightless in space Robert measures an object to be 5 m away. while his much twin sister Roberta measures the same object to be 3 memuy. which of the following statements must be true? Select one: a. Robert and Roberta are exactly & m apart. O b. Rober c. Robert and Robe O d. The separ ert and his When going around a cloverlent a car suddenly comes upon a long stretch of est tonless Ice. At this inpart the car Select one: a. continues around the co c uniformly completing its circular trajectory O b. continue ner, but at with a larger are O c continues on in a straight line path O d. begins to tumble Which is not an mikes unit? Select one O a. meter b. kilogram O e. second O d. centimeter