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Physics 1: Chapter 5 Quiz Questions

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If = 10, = 15, and a = 130°, determine the scalar product of the two vectors shown. 1) +96 2) -96 3) +51 4) -51 5) -35 A 2.0-kg block sliding on a frictionless horizontal surface is attached to one end of a horizontal spring (k = 600 N/m) which has its other end fixed. The speed of the block when the spring is extended 20 cm is equal to 3.0 m/s. What is the maximum speed of this block as it oscillates? 1) 4.6 m/s 2) 5.3 m/s 3) 5.7 m/s 4) 4.9 m/s 5) 3.5 m/s A block slides on a rough horizontal surface from point A to point B. A force (magnitude P = 2.0 N) acts on the block between A and B, as shown. Points A and B are 1.5 m apart. If the kinetic energies of the block at A and B are 5.0 J and 4.0 J, respectively, how much work is done on the block by the force of friction as the block moves from A to B? 1) -3.3 J 2) +1.3 J 3) +3.3 J 4) -1.3 J 5) +4.6 J

1) +96

1) 4.6 m/s

1) -3.3 J

A 1.5-kg object moving along the x axis has a velocity of +4.0 m/s at x = 0. If the only force acting on this object is shown in the figure, what is the kinetic energy of the object at x = +3.0 m? 1) 18 J 2) 21 J 3) 23 J 4) 26 J 5) 8 J A force acting on an object moving along the x axis is given by Fx = (14x - 3.0x2) N where x is in m. How much work is done by this force as the object moves from x = -1 m to x = +2 m? 1) +12 J 2) +28 J 3) +40 J 4) +42 J 5) -28 J If = 5.0, = 8.0, and a = 30°, determine the scalar product of the two vectors shown. 1) -35 2) +35 3) -20 4) +20 5) +40

1) 18 J

1) +12 J

1) -35

A 3.0-kg block is on a frictionless horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 2.0 N) acting at an angle of 22° above the horizontal is applied to the block. At what rate is the force P doing work at t = 2.0 s? 1) 2.3 W 2) 2.0 W 3) 1.4 W 4) 1.7 W 5) 1.2 W The horizontal surface on which the block slides is frictionless. The speed of

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