final quiz 1_merged

12/13/22, 7:53 PM Quizzes 2 https://canvas.sbcc.edu/courses/49817/external_tools/retrieve?display=full_width&url=https%3A%2F%2Fsbcc.quiz-lti-iad-prod.instructure.com%2Flti%2Flaunch%3… 2/3 Correct Answer: 52.9 0 / 0 points Vector has an x-component of 6.44 and a y-component of 2.92. Vector has an x-component of 2.42 and a y-component of 6.64. The magnitude of the vector is __________. 13.034 0 / 0 points A person leans out of a window and throws a ball straight up with an initial speed of 7.30 . It hits the ground a time of 2.53 after it is thrown. Ignore air resistance. The height of the window is ______ above the ground. Enter your answer as a positive number. (no answer) Correct Answer: 12.9 0 / 0 points A soccer player kicks a ball, giving it a launch angle of from the ground. It lands on the Øeld a horizontal distance of 21.1 away from its starting point. Ignore air resistance. The ball was in the air for a time of ________ . (no answer) Correct Answer: 1.58 0 / 0 points A car is driving around a circular track, changing both speed and direction. Its "total acceleration vector" has a centripetal component and a tangential component . The angle between and the velocity vector is deØned to be . Check all the answers which are true statements. There may be more than one correct answer! A B + A B s m s m 30 o m s a a c a t a v θ if the car's speed is increasing. θ < 90 o 3 4 5 6

12/13/22, 7:53 PM Quizzes 2 https://canvas.sbcc.edu/courses/49817/external_tools/retrieve?display=full_width&url=https%3A%2F%2Fsbcc.quiz-lti-iad-prod.instructure.com%2Flti%2Flaunch%3… 3/3 Missed Option - Incorrect Missed Option - Incorrect Missed Option - Incorrect (no answer) 0 / 0 points Block #1 (mass = 3.80 ) and Block #2 (mass = 1.40 ) are side-by-side on a frictionless table. A person pushes horizontally on Block #1 with a force of , causing both blocks to accelerate. During this process, Block #1 pushes on Block #2 with a force of _________ . (no answer) Correct Answer: 2.69 0 / 0 points A block slides down a ramp which is inclined at 33.3 o above horizontal. The coefØcient of kinetic friction between block and ramp is 0.255. The acceleration of the block down the ramp is _________ . (no answer) if the car s speed is increasing. θ < 90 The component points away from the center of the circular track. a c The component is always perpendicular to . a c v if is positive and . θ < 45 o a t a > t a c describes the change in the car's direction, and describes the change in the car's speed. a t a c kg kg 10.0N N s 2 m 7 8