A train starts from rest and accelerates uniformly to achieve a velocity of 20 m per sec in 10 sec. Then the train maintains this speed for next 200 s. The breaks are then applied and train comes to rest in next 50 s. Calculate: a) acceleration in first 10 s b) acceleration in last 50 s c) the total distance traveled by the train in whole journey d) average velocity of the trip.

A person walks first at a constant speed of 4.90 m/s along a straight line from point to point and then back along the line from to m/s. (a) What is her average speed over the entire trip? m/s (b) What is her average velocity over the entire trip? m/s @ at a constant speed of 3.10

(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?

Problem 5. An object is moving with an initial position of 28m from the origin with an initial velocity of -4m/s and constant acceleration of 8m/s². (1) How fast is the body moving after 2s? (2) What is its position 3s after the start? (3) When will it be 36m from the origin?

A busy chipmunk runs back and forth along a straight line of acorns that has been set out between its burrow and a nearby tree. At some instant, it moves with a velocity of -1.39 m/s. Then, 2.73 s later, it moves with a velocity of 1.67 m/s. What is the chipmunk's average acceleration during the 2.73 s time interval? average acceleration: m/s? about us careers privacy policy terms of use contact us help tv MacBook Air F12 F10 F11 F9 吕0, F3 F7 F8 F5 & * delete 6 8

And object moves with constant Acceleration 3.00 m/s^2 and over a time interval reaches a final velocity of 10.6 m/s (A)If it's original velocity is 5.3 m/s what is it's displacement during the time interval (B)What is the distance it traveled during this interval (C)If it's initial velocity is -5.3 m/s one is it's displacement during this interval (D) What is the total distance it travels during the interval in parts (c)

In April 1974, Steve Prefontaine completed a 10.0 km race in a time of 27 min, 43.6 s. Suppose "Pre" was at the 7.29 km mark at a time of 25.0 min. If he accelerated for 60 s and then maintained his increased speed for the remainder of the race, calculate his acceleration over the 60 s interval. Assume his instantaneous speed at the 7.29 km mark was the same as his overall average speed up to that time.acceleration = ? m/s2

A person walks at a constant speed of 4.0 m/s along a straight line from point a to point b and back along the line from point b to a at a constant speed of 3.20 m/s. What is her average speed over the entire trip? What is her average velocity over the entire trip?