Q1. The Gravitational force exerted by the sun on the earth holds the earth in an orbit around the sun. Let us assume that the orbit is perfectly circular. The workdone by this gravitational force during a short time interval in which the earth moves through a displacement in its orbital path is a. Zero b. Positive c. Negative d. Impossible to determine Q2. A dart is inserted into a spring-loaded dart gun by pushing the spring in by a distance x. For the next loading the spring is compressed a distance 2x. How much work done is required to load the second dart compare with that required to load the first? a. Four times as much b. Two times as much c. The same d. Half as much e. One-fourth as much Q3. Which of the following statements is true about the relationship between the dot product of two vectors and the product of magnitudes of the vectors? a. A.B is larger than AB b. A.B is smaller than AB c. A.B could be larger or smaller than AB, depending on the angle between the vectors d. A.B could be equal to AB

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Q1. The Gravitational force exerted by the sun on the earth holds the earth in an orbit around the sun. Let us assume that the orbit is perfectly circular. The workdone by this gravitational force during a short time interval in which the earth moves through a displacement in its orbital path is a. Zero b. Positive c. Negative d. Impossible to determine Q2. A dart is inserted into a spring-loaded dart gun by pushing the spring in by a distance x. For the next loading the spring is compressed a distance 2x. How much work done is required to load the second dart compare with that required to load the first? a. Four times as much b. Two times as much c. The same d. Half as much e. One-fourth as much Q3. Which of the following statements is true about the relationship between the dot product of two vectors and the product of magnitudes of the vectors? a. A.B is larger than AB b. A.B is smaller than AB c. A.B could be larger or smaller than AB, depending on the angle between the vectors d. A.B could be equal to AB Q4. Figure shows four situations in which a force is applied to an object. In all four cases the force has same magnitude, and the displacement of the object is to the right and of the same magnitude. Rank the situations in order of the work done by the force on the object, from most positive to most negative?
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