1) The position versus time for a certain object moving along the x-axis is shown. The object's initial position is -3meters.

The graph is position in meters for the y axis and the x axis is time in seonds.

Point one on the grpah for 0 sec. is at (0,-3), 1 sec at (1,3), 2 sec (2,9), 3 sec (3,6.1 approx), 4 sec (4,4), 5 sec (5,4), 6 sec (6,0), for 7 sec (7,-4) and for 8 sec (8,-2) and 9 sec (9,0)

1) Find the average velocity in the time interval 0 sec to 4 sec. Answer in units of m/s.

2) Find average velocity for 2 to 4 sec, then for 4 to 7 sec, and then for 0 to 9 sec please.

---------------------------------------------

3) A person takes a trip driving with a constant speed 98.5 km/h except for a 15.1 min rest stop. If the person's average speed is 67.4 km/h, how much time is spent on the trip? Answer in units of h?

Solution Preview

(1) There is some difference between average speed and average velocity.
The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time. Velocity is a vector quantity, so in this case the time interval is 0 sec to 4 sec, so the time elapsed is 4 sec.

The object's position is -3m at 0 sec and 4m at 4 sec and the object moves in a ...

Solution Summary

This solution is provided in 371 words. It describes the difference between average speed and average velocity, as well as demonstrates how to calculate average velocity and time spent on a trip.

... Calculating average velocities is a practical and readily understood application of the ... distance function and apply it to find the average velocity, during a ...

... B. Compute your average velocity in m/s. Enter the east and south components of the velocity separated by a comma. ... B. Compute your average velocity in . ...

... 2 where v_1 and v_2 are the initial and final instantaneous velocities. ... s and in miles/h. Now, what is the average velocity of the earth, averaged over one ...

... time graph for car 2. f. Determine the overall average velocity of car 2. g. Sketch the average velocity line in your graph from part e. Make sure all of your ...

... with constant acceleration and travels 640 m in 40 s. For the 40 s interval, find (a) the average velocity, (b) the final velocity, and (c) the acceleration. ...

... There are several different ways to describe statistically the average velocity of a molecule in a gas. The most obvious measure is the average velocity . ...

... (b) What is the average velocity of the truck for the motion described? 2. 55. ... (b) What is the average velocity of the truck for the motion described? 2. 55. ...

velocity and acceleration.. 4.) A car has an average speed of 80.0 km/h for one hour, then an average speed of 90.0 km/h for two hours during a three-hour trip ...

... is not moving at the beginning of the 13cm barrel, then leaves the barrel at 300m/s. The average velocity would be the average of all velocities while it was ...