Practice Test: AP Physics C Vectors

 Unit Plan Practice Test Study Guide
 AP Physics C Practice Test Vector Addition Name _____________________________ Period _____________ Date __________________ Assume magic land conditions on all problems unless stated otherwise. In other words there is no air resistance or friction. 1 ) An object accelerates downward at 3 m/s/s what is the direction of the net force acting on the object? Downward. The net force and acceleration go in the same direction 2 ) An object is displaced 90 meters to the north. What is the direction of the object's average velocity? To the north. The displacement and velocity go in the same direction. 3 ) What is the relationship of the magnitudes of a vectors components? Independent 4 ) What is the relationship of the directions of a vectors components? Right angles. Remember, components align with either the x, y, or z axis. 5 ) A vector has a y-component of 23 N and an x-component of - 37 N. Find the vector's magnitude. Magnitude = 43.6 6 ) If a ball is throw with a velocity of 50 m/s at an angle of 37 degrees above the horizontal, what is its horizontal velocity component? 40 m/s 7 ) When adding two vectors, the resultant will be greatest when the angle between the two vectors is _________________. 0 degrees, They're in the same dimension and going in the same direction. 8 ) The x-component of a vector = 30 and the y-component = 40. Find the angle of the resultant vector. 53 degrees 9 ) You have a 12 N force and a 5 N force. When they are added together, what are the maximum and minimum magnitude possible forces? Assume you can manipulate the angle. Max = 17, min = 7 10 ) Calculate the minimum time for Running Bear to swim across a raging river with a current of 2.5 m/s if he can swim at 2.0 m/s and the raging river is 100 m wide. Min time = 50 sec 11 ) Calculate the time for Running Bear to swim straight across a raging river with a current of 1.5 m/s if he can swim at 2.0 m/s and the raging river is 100 m wide. Time = 76 sec

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