What physical relationships between position and time and velocity and time of an object subjected to constant acceleration down an inclined plane? Does the angle of the incline have an effect on the estimated acceleration? Why or why not?
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What physical relationships between position and time and velocity and time of an object subjected to constant acceleration down an inclined plane?
Does the angle of the incline have an effect on the estimated acceleration? Why or why not?
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- ... .. 黑 庫 康 圖 重 團 廉 知連 国 軍 | 国 庫 康 |重 A body moves along one dimension with a constant acceleration of 4,65 m/s over a time interval. At the end of this interval it has reached a velocity of 11.8 m/s. (a) If its original velocity is 5.90 m/s, what is its displacement (in m) during the time interval? m (b) What is the distance it travels (in m) during this interval? (c) A second body moves in one dimension, also with a constant acceleration of 4.65 m/s , but over some different time interval. Like the first body, its velocity at the end of the interval is 11.8 m/s, but its initial velocity is -5.90 m/s. What is the displacement (in m) of the secorkd body over this interval? (d) What is the total distance traveled (in m) by the second body in part (c), during the interval in part (c)? mThe leaning tower of Pisa is 57 m tall. Supposedly Galileo investigated the behavior of falling objects by dropping them from the top of this tower and timing their descent. How long would it take an object to fall 57 m if air effects are negligible? Express your answer in 2 decimal places and in seconds.A ball is thrown vertically upward with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², how high will the ball go? And what is the total time it takes for the ball to reach its highest point and then return to the ground?
- Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +20.7 km/s to −19.1 km/s over a period of 2.19 years. (a) What is the total change in the asteroid's velocity? (Indicate the direction with the sign of your answer.) (b) What is the asteroid's average acceleration during this interval? (Indicate the direction with the sign of your answer.)A graph of v(t) is shown for a world-class track sprinter in a 100-m race. (See figure below). Runner Velocity vs. Time Velocity (m/s) 14 12 2086 2 0 2 6 Time (s) 8 10 12 (a) What is his average velocity (in m/s) for the first 4 s? m/s (b) What is his instantaneous velocity (in m/s) at t = 6 s? m/s (c) What is his average acceleration (in m/s²) between 0 and 4 s? m/s² (d) What is his time (in s) for the race? SA boxer's fist and glove have a mass of m = 1.04 kg. The boxer's fist can obtain a speed of v = 9.25 m/s in a time of t = 0.21 s. Write a symbolic expression for the magnitude of the average acceleration, aave, of the boxer's fist, in terms of the variables provided. Find the magnitude of the average acceleration, aave, in meters per square second. Write an expression for the magnitude of the average net force, Fb, that the boxer must apply to his fist to achieve the given velocity. (Write the expression in terms of m, v and t.) What is the numerical value of Fb, in newtons?
- The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m/s (128 mph) in just 3.5 s. (Assume the cars are launched in the positive horizontal direction. Indicate the direction with the sign of your answer where appropriate.) (a) What is the acceleration experienced by passengers on this ride in m/s2? m/s2What is the acceleration experienced by passengers on this ride in g's? g(b) If a certain passenger has a mass of 73 kg, what is the force in newtons that acts on him during the launch phase of this ride? NWhat is the force in pounds that acts on him during the launch phase of this ride? lbIf the bushwalker takes 5 hours to complete the entire walk of 22 km including a 1.5 h rest, the average walking velocity of the bushwalker over the 5 hours is closest to A 2.19 km/h B 8.75 km/h C 0 km/h D 4.37 km/h E 2.69 km/h