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- 5. An object is launched 15 m/s horizontally. A. Fill in the variables for the object. B. Solve for time in the y-direction. C. Since the x-direction is constant speed, solve for Ax.6. Is it possible for an object to have zero acceleration but still have a velocity? If so, give an example. If not, explain why notIn an amusement-park ride, cars rolling along at high speed suddenly head up a long, straight ramp. They roll up the ramp, reverse direction at the highest point, then roll backward back down the ramp. In each of the following segments of the motion, which way does the acceleration vector point?a. As the cars roll up the ramp.b. At the highest point on the ramp.c. As the cars roll back down the ramp.
- 2. A jet plane has a takeoff speed of vtakeoff = 73 m/s and can move along the runway at an average acceleration of 2.4 m/s2. The runway is 1.2 km. Write out the 3 Kinetic equations. a. b. Write out the values of initial position, initial velocity, and acceleration. How many seconds will it take for the plane to reach takeoff speed? с. d. How far will the plane have to travel to get to takeoff speed? will the plane be able to get to take off before it gets to the end of the runway? е.1. A ball is thrown vertically upward from the ground with a speed of 36.0 m/s. Suppose the acceleration of gravity were only 2.00 m/s² instead of 9.80 m/s² a) At what time after being thrown does the ball have a velocity of 12.0 m/s upward? b) At what time does it have a velocity of 12.0 m/s downward? c) When is the velocity of the ball zero? d) When is the displacement of the ball zero? e) What are the magnitude and direction of the acceleration while the ball is moving upward? f) What are the magnitude and direction of the acceleration while the ball is moving downward? g) What are the magnitude and direction of the acceleration when it is at the highest point?1. You are driving at 8.00 m/s south. You accelerate uniformly at 1.10 m/s? north for 5.00 seconds. How fast are you going at the end of the 5.00 seconds? What is your displacement?
- ř=(−b₁t³+b₂t)i+c₁t²_c₂t+c₂) j Assume that b₁,b2, C₁, C2, and C3 are positive constants. Which of the following statements must be true? a. The acceleration vector is constant. b. As time passes, the object's acceleration vector is directed in the 2nd quadrant. C. The object is initially at the origin. d. The object's initial velocity is directed in the 4th quadrant. e. V changes sign at the time t=b₂/b₁. X 2Page < c. The acceleration is +1.5 m/s². d. The acceleration is +3.0 m/s². e. The acceleration cannot be determined. 2 Multiple Choice Questions 1. A car enters a 25-m intersection travelling with a velocity 5 m/s in the west direction. When it clears the intersection (after it covers the 25-m), it is travelling with a velocity of 10 m/s still in the west direction. What is the acceleration of the car? Assume that east is in the positive x-axis and west is in the negative x-axis. a. The acceleration is -9.81 m/s. b. The acceleration is -1.5 m/s².7. Is it possible for an object to have zero velocity but still have an acceleration? If so, give an example. If not, explain why not.