Which of the following is the velocity graph for a negative initial velocity and a positive acceleration?

From the above plot of velocity versus time, calculate the final position x att = 100 s if the initial position at t = 0 s is x0 = -25.0m? Justify your answer. What is the object’s acceleration at t = 10 s, t = 40 s, and t = 85 s? Justify your answers.

If we apply the above equations to the case of an object that does not change its direction of travel as it moves with constant acceleration, we find that the object: Undergoes a displacement Ax = x- x, . Note that displacement is a positive quantity if x > x, and a negative quantity if x < x,. Has average velocity v = (x - x )/t = (v + vo)/2. Note that velocity has the same sign as displacement. Travels distance d = |Ax| = |x – x,| . Note that distance is always a positive quantity. Has average speed d/t . Note that speed is always a positive quantity. Has constant acceleration a = (v – vo)/t . Acceleration may be positive or negative, depending on how velocity changes. - Xo For the case of an object that does change its direction of travel as it moves with constant acceleration, which of the quantities listed above are different? Question

A jogger jogs from one end to the other of a straight track in 1.08 min and then back to the starting point in 1.53 min. What is the jogger's average speed at the following points? (Assume the track is 100 m long.)  a in jogging to the far end of the track (b) coming back to the starting point (c) for the total jog

A ball was thrown vertically downward from a 50-m high building with an initial speed of 5m/s. What is the magnitude of the acceleration after 1.0s?

The graph depicts an particle's velocity (in the x-direction) vs. time.  At which points is the object's acceleration negative? (Check all that apply.)   Group of answer choices C B D A E

A scooter has a constant acceleration of +4.0 /s. Find its displacement after 2.0 s, if the initial velocity of the boat is +8.0 m/s. a) 42 m; b) 28 m; c) 24 m; d) 14 m.

A stone is thrown upward with an initial velocity of 128 ft/s from the roof of a building 320 ft high. Express its height above the ground as a function of time. Find the following:  a) The maximum height that the stone reaches b) The time it takes for the stone to hit the ground c) The velocity and speed of the stone when it hits the ground

A woodchuck runs 22 m to the right in 9 s, then turns and runs 11 m to the left in 4 s. (Assume motion to the right is positive. Where applicable, indicate the direction with the sign of your answer. Enter your answers in m/s.) (a) What is the average velocity of the woodchuck? m/s (b) What is its average speed? m/s

(a) Give two differences between average speed and average velocity. (b) For an object that undergoes some motion starting at one point and ending at different point, what does the average value of the speed (or velocity) tell you about the motion of the object on this trip and what does the instantaneous value of speed (or velocity) tell you about the motion of the object on this trip? (c) On a position versus time graph how do you determine the average velocity and the instantaneous velocity? (d) Illustrate your answer to (c) with a position versus time graph. (e) Why is the instantaneous speed always the magnitude of the instantaneous velocity?