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i need help with these set of problems. please answer these i will rate thumbs up.
Jack is traveling South at a steady 60.0 mi/hr (26.8 m/s) on a straight portion of Route 3. The car directly ahead of him is also traveling at 60 mi/hr. Jack is keeping what he feels is a safe distance from the car directly ahead of him, 25.0m (roughly 5.6 car lengths). Suddenly at t=0, having noticed a posted speed limit of 30.0 mi/hr (due to road construction, the driver of the car ahead slams on his brakes and begins to slow down at a steady rate of 10,0 - Once he has slowed down to 30.0 mi/hr (13.4 m/s), he plans to maintain this constant speed. Suppose that it takes lack 1.00 second to notice that the car ahead has slowed down, and another 200 seconds to effectively apply his brakes. Also suppose that, once he has applied his brakes, lack's car slows down at a steady rate of 100 m X.0 X=25.0 m 16. Assume, for the sake of argument, that no collision occurs. What distance will Jack's car travel while he is in the process of slowing down to 30.0 mithe? A 25.0m B. 53.9 m. C. 78.9 m. D. 26.9 m. E 135 m 17. Which of the following statements is true? A. A collision occurs before the car ahead has slowed down to 30.0 mi/hr? 8. A collision occurs after the car ahead has siowed down to 30.0 mi/hr but before Jack has even applied his brakes? C. A collision occurs after Jack has applied his brakes but before he can slow down to 30.0mihr? D. There is no collision, but at the instant Jack's car has slowed down to 30.0 mi/hr, his front bumperis less than 3,00 meters from the rear bumper of the car ahead. E There is no collision, but at the instant Jack's car has slowed down to 30.0 mi/hr, his front bumper is less than 100 meter from the rear bumper of the car ahead. 6
During a baseball game played on a level field in Fenway Park), a batter hits a baill at an angle of 40 degrees above the horizontal At the instant when the ball loses contact with the bat, the ball is located 1.00 m above the ground, at a horizontal distance of 94.5 m from an 11.3 m tall fence, and the ball is traveling at a speed of 33.0 m/s-as shown in the figure In the following, assume that air resistance is negligible and that g=980 m2 33.0 100m 5m 18. How much time would it take the ball to travel a horizontal distance of 94.5m? A. 2.16 s. B.2.86s. C. 4.45 D. 3.375 E 3.745. 19. Which one of the following statements is correct? A. The ball hits the ground before reaching the fence. B. The ball hits the fence -0.2 m below the top of the fence C. The ball passes over the top of the fence-0.52 m above the top of the fence. D. The ball passes over the top of the fence-1.82 m above the top of the fence. E The ball passes over the top of the fence -0.82 m above the top of the fence 7