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8 questions
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A car travels down a road at a certain velocity, . The driver slows down so that the car is traveling only half as fast as before. Which of the following is the correct expression for the resulting velocity?
A student walks from the door of the house to the end of the driveway and realizes that he missed the bus. The student runs back to the house, traveling three times as fast. Which of the following is the correct expression for the resulting velocity
Which of the following is the best coordinate system to analyze a painter climbing a ladder at an angle of to the ground?
x-axis = horizontal along the ground; y-axis = along the ladder
x-axis = up and down; y-axis = horizontal along the ground
x-axis = horizontal along the ground; y-axis = up and down
x-axis = along the ladder; y-axis = up and down
In a coordinate system, which trigonometric function is multiplied to the x-component of a given vector's magnitude with respect to the angle between the vector and the x-axis?
the cosine of
the cotangent of
the sine of
the tangent of
An athlete runs 110 m across a level field at an angle of 30o north of east. What are the east and north components, respectively, of this displacement?
A swan waddles 2.5 m east and 6.0 m north. What are the magnitude and direction of the swan's displacement with respect to its original position?
29 cm at 59o north of east
29 cm at 77o north of east
52 cm at 29o north of east
57 cm at 29o north of east
Which of the following does NOT exhibit parabolic motion?
A frog jumping from land into water.
A basketball thrown to a hoop.
A flat piece of paper released from a window.
A baseball thrown to home plate.