Physics SLO Test Review

Physics SLO Test Review The SI unit of length, the meter, is currently defined - as the length of the path traveled by light in a vacuum during 1/ s. The SI unit of mass, the kilogram, is currently defined - by a prototype platinum-iridium cylinder kept at the International Bureau of Weights and Measures in Sevres, France. The SI unit of time, the second, is currently defined by - a duration of an atomic clock Which of the following is a megawatt? - 10^6 W Which of the following is a microsecond? - 10^-6 s How many significant figures are in 0.0037010? - five All of the following are vectors, except mass acceleration force velocity displacement - mass Speed is to velocity as distance is to - displacement Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled - The displacement is either less than or equal to the distance travel When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? - Its acceleration is constant When a ball is thrown straight up, which of the following is zero at its highest point? velocity displacement acceleration - velocity When a ball is thrown straight up, the acceleration at its highest point is - downward A component of a vector can be greater than the vector's magnitude. - False If A+B = C (all vectors) and A^2 + B^2 = C^2, then the vectors A and B are oriented perpendicular relative to one another. - True The magnitude of a unit vector is one. - True The horizontal component of the velocity of a projectile remains constant during the entire trajectory of the projectile. - True The vertical component of the acceleration of a projectile remains constant during the entire trajectory of the projectile. - True