SUNO Spring 2018 Test I (2-27-2018) General Physies I Natural Sciences/Physies P
ID: 1580484 • Letter: S
Question
SUNO Spring 2018 Test I (2-27-2018) General Physies I Natural Sciences/Physies Phys211 Please solve 5 problems only and you must show your work 1. A) Which of the following equations are dimensionally correet? (Select all that are correct.) B) Compute the order of magnitude of the mass of a bathtub full of water. (Bathtub. Assume the tub measures 1.3 m by 0.5 m by 0.3 m.) p 1.00 10'kg/m C) Carry out the the product 0.0031 356.5 figures) 2. A certain automobile manufacturer claims that its deluxe sports car will accelerate from rest to a speed of 50.0 m/s in 7.00 s. a) Determine the average acceleration of the car Assume that the car moves with constant acceleration. Find the distance the car travels in the first 7.00 s. ) c) What is the speed of the car 10.0 s after it begins its motion if it continues to move with the same acceleration? 3. An object moves along the x axis according to the equation x-5t-2.00t+3.00, where x is in meters and t is in seconds. a. Determine the average speed between t- 3.00 s and t 5.00s. b. Determine the instantaneous speed at t 3.00 s and t-5.00 s. c. Determine the average acceleration between t = 3.00 s and 5.00 s. d. Determine the instantancous acceleration at t-3.00 s and t-5.00 s. e. At what time is the object at rest? 4. Two points in the x y plane have Cartesian coordinates (2.00,-5.00) m and (-8.00, 8.00) m. a) Determine the distance between these points. b) Determine their polar coordinates, r, A billiard ball undergoes two displacements. The first has a magnitude of 150 cm and makes an angle of 120.0° with the positive x-axis. an angle of 35.0° to the positive x-axis. Find the magnitude and direction of the second displacement. 5. The resultant displacement has a magnitude of 140 cm and is directed at 6. A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to reach its maximum height. Find (a) its initial velocity and (b) the height reached by the ball. 7. An electron in a cathode-ray-tube (CRT) accelerates uniformly from 6.00 x 10' m's to 6.00 X 10° mis over 2.00 cm. a. In what time interval does the electron travel this 1.00 em? b. What is its acceleration?Explanation / Answer
According to Chegg guidelines, we are not supposed to solve multiple questions in one go. Please post the other questions separately.Thanks
2) Car goes from 0m/s to 50 m/s in 7s
a) Acceleration , a = Change in Velocity / time taken =====> 50 - 0 / 7 ===> 7.1428 m/s2
b) Using s = ut + 0.5 at2 ; we get s = 0 + 0.5*7.1428*49 ====> s = 174.9986 meters
c) Using, v = u + at , we get v ( t = 10 s) = 0 + 7.1428*10 ===> v = 71.428 m/s
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