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- I need help1. A ball is thrown upward from the top of a 50 meter high building with an initial speed of 25 m/s.a. How much time does it take to reach the ground?b. What velocity does it have when it reaches the ground?Winter 2020.docx References Review View Help Table O Tell me what you want to do 12 BIUOr Av A Ev E E A ... Page Break 3. The following graph tracks the motion of a dog chasing a squirrel. What is the velocity of the dog? 4 X 2 1 0 1 3 t (s) 5 6. 2 4. X (m) 299
- Q10. A car travels 15 km in 1 hour, what is its average velocity. A _10misec B-416 m/sec C-2misec D-35misec § Show AnswerAn object has an acceleration defined by the equation a=5t+4 (m/s^2) where "t" is in seconds. The initial velocity of the object is -10 m/s and started at a position s = 40m. 1. How much time is needed for the particle to reach a velocity equal to zero? Express your answer in unit of second. 2. What is the position of the object when it reaches zero velocity?6. a) Describe the motion pictured by the v-vs.-t graph shown. v(m/s), + 6 7 H t(s) 4.
- Use the value of g = 9.80 [m/s^2]A sports car driven by Snoop Dog covers 60 m in 10 sec while uniformly slowing down to a final velocity of 5.637 knots. a. Solve for the sport car's original speed b. Solve for its acceleration.Assume that a student came up with an equation as S = k10 amt" where S is the distance, a is the acceleration and t is the time. If the constant k has a dimension of L/T, find the values of the integers n and m. Select one: O A. n=8, m=-9 O B. n=8, m3-8 OC. n=-9, m=-9 OD. n=-8, m=-9 O E. n=-8, m=8
- The equation of motion of a particle, which started at t = 0, is given by x=5sin(20t+π/3), where x is in centimeter and t in second. a. When does the particle first come to rest? b. When does the particle first have zero acceleration? c. When does the particle first have maximum speed?Suppose you take a 3-hour trip in your car. For the first hour, you travel at a speed of 60 mi/hr. The weather suddenly gets very bad so that for the remaining 2 hours you travel at a speed of only 30 mi/hr. What was your average speed for the full three-hour trip? I1