An automobile travels on a straight road for 40 km at 30kph. It then continues in the samedirection for another 40 km at 60 kph. (a) What is the average velocity of the car during this 80km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (c)Graph x versus t and indicate how the average velocity is found on the graph.The position of an object moving along an x-axis is given by x = 3t – 4t² + t³, where x is inmeters and t is in seconds. Find the position of the object at the following values of t: (a) 1s, (b)25, (c) 3s, and (d) 4s. (e) What is the object's displacement between t = 0 and t = 4s? (f) What isthe average velocity for the time interval from t =2s and t = 4s?The position of a particle moving along the x-axis is given in centimeters by x = 9.75 + 1.5t³,where t is in seconds. Calculate (a) the average velocity during the time interval t = 2s to t = 35;(b) the instantaneous velocity at t = 2s; (c) and the instantaneous velocity at t = 2.5s.At a certain time a particle had a speed of 18 m/s in the positive x-direction, and 2.4 seconds later,its speed was 30 m/s in the opposite direction. What is the average acceleration of the particleduring this 2.4s interval?

Answered: Image /qna-images/answer/c391f4f8-4812-4433-9aaa-59a412b3be9b.jpg

An automobile travels on a straight road for 40 km at 30kph. It then continues in the same direction for another 40 km at 60 kph. (a) What is the average velocity of the car during this 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (c) Graph x versus t and indicate how the average velocity is found on the graph.

An automobile travels on a straight road for 40 km at 30kph. It then continues in the same direction for another 40 km at 60 kph. (a) What is the average velocity of the car during this 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (c) Graph x versus t and indicate how the average velocity is found on the graph.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A physics teacher walks 5 km East, 2.5 km South, 5 km West, and finally 2.5 km North. The entire motion lasted for 3 hours. Determine the average speed and the average velocity.
Usually, Tony travels to Bunbury from Perth city in 2.50 hours. One day he increases his average speed by 12.0 km/h and takes 22.5 minutes less time to reach Bunbury. (a) What was his usual average speed? What was the distance travelled? (b) On the way he stopped at a rail crossing (6.00 m wide) and a train (total length 144m) decelerating at -0.585 ms2 just entered the crossing with a velocity of 13.7 m s¹. Sketch a diagram and find the minimum time for the last carriage of the train to clear the crossing.
An automobile travels on a straight road for 40 km at 30 km/h. It then continues in the same direction for another 40 km at 60 km/h. (a) What is the average velocity of the car during the full 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (c) Graph x versus t and indicate how the average velocity is found on the graph.
Assume that you are driving a car at 10.0 km/h and then you accelerate to 80.0 km/h with an acceleration of 3.50 m/s². How much time will it take until you reach the velocity 80.0 km/h? (Provide you answer in s with two decimal places.) Your Answer:
A car traveling 59.1 km/h is 29.5 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.68 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact? (a) Number i (b) Number i Units Units
For the following function models the position s(t)s(t) of an object moving along a stright line, where tt is in seconds and ss is in meters. s(t)=t2-6t Find the simplified expression for the average velocity from t=7t=7 to t=7+ht=7+h. s(t+h)-s(t)/h=?
H+
If a particle increases in speed at a constant rate as it moves in the positive direction along an x axis, which of the following describes a plot of its velocity versus time? O plot has constant positive slope plot has constant negative slope O plot has zero slope
You are driving home from school steadily at 95 km/h for 180km. It then begins to rain and you slow to 65 km/h. You arrive home after driving 4.5 h. (a) How far is your hometown from school? (b) What was your average speed?
A person on a road trip drives a car at different constant speeds over several legs of the trip. She drives for 10.0 min at 60.0 km/h, 20.0 min at 65.0 km/h, and 30.0 min at 50.0 km/h and spends 55.0 min eating lunch and buying gas. (a) What is the total distance traveled over the entire trip (in km)? km (b) What is the average speed for the entire trip (in km/h)? km/h
A bus initially at a bus stop accelerates continuously for a kilometer, taking a minute and a half. Upon closing in on the next stop, the driver then begins to hit the brakes until it reaches a full stop in 8 seconds. Find the total distance that the bus traveled and the velocity of the bus just before it begins decelerating.
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 85.0 km/h, 17.0 min at 90.0 km/h and 55.0 min at 40.0 km/h, and spends 35.0 min eating lunch and buying gas. (a) Determine the average speed for the trip. km/h (b) Determine the distance between the initial and final cities along this route. km