Answer question number 1 Assessment1. A rolling ball moves from x, = 8.4 cm to x, = -4.2 cm to during the time from t, = 3.0 s to t, =6.1 s. What is its average velocity over this time interval?2. At highway speeds, a particular automobile is capable of an acceleration of about 1.8 m/s². Atthis rate, how long does it take to accelerate from 65 km/h to 120 km/h.3. A world-class sprinter can reach a top speed (of about 11.5 m/s) in the first 18.0 m of a race.What is the average acceleration of this sprinter and how long does it take her to reach thatspeed?4. Estimate (a) how long it took King Kong to fall straight down from the top of the Empire StateBuilding (380 m high), and (b) his velocity just before "landing."5. Graphically determine the resultant of the following three vector displacements: (1) 24 m, 36°north of east; (2) 18 m, 37° east of north; and (3) 26 m, 33° west of south.6. The summit of a mountain, 2450 m above base camp, is measured on a map to be 4580 mhorizontally from the camp in a direction 38.4° west of north. What are the components of thedisplacement vector from camp to summit? What is its magnitude? Choose the x axis east, yaxis north, and z axis up.7. A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base.What was the ball's initial speed?

The displacement of an object is defined as the change in the final and initial position of an…

Answered: 1. A rolling ball moves from x1 = 8.4…

1. A rolling ball moves from x1 = 8.4 cm to x2 = -4.2 cm to during the time from t, = 3.0 s to tz = 6.1 s. What is its average velocity over this time interval?

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

5. A car with an initial velocity of 9_ m/s, accelerates at a constant rate of 3.6 m/s?. a. How much time is required for it to travel 300 meters? b. What is its velocity (in m/s) upon reaching 300 meters?
1. A rolling ball moves from x1 = 3.4cm to x2 = - 4.2 cm during the time from t1 = 3.0s to t2 = 6.1s. What is the average vel1ocity? 2. A car accelerates along a straight road from rest to 75km/h in 5.0 s. What is the magnitude of its average acceleration in m/s?? 3. A drag racer starts her car from rest and accelerates at a constant rate 10.0 m/s2² for a distance of 400 m. (a) How long did it take the race car to travel this distance? (b) What is the speed of the race car at the end of the run?
2. The graph shows the x-velocity of a very slow industrial robot as a function of time. a. What is the x-acceleration at t = 5 s? b. What is the x-acceleration at t = 20 s? c. That is c. What is the x-acceleration at t = 27 s? Vx (cm/s) 60 40 20 0 -20 -40 0 x-velocity vs. time 5 10 15 20 25 30 time (sec) d. During the first interval from 0 to 10 s, the acceleration is constant, and we know that x = x + VoxAt + ax(At)² while vx = Vox + ax^t. Here x, and vox are the x-position and x-velocity at the beginning of the constant acceleration interval and At is the time from the beginning of the constant acceleration interval. i. Write an expression for the x-position as a function of time t for the first interval, i.e., for 0 < t < 10 s. Your expression should only contain the variablet and the correct values (with units) of the constants xo, Vox, and a. Assume x = 0 at t = 0.
Dwight decides to race around the perimeter of the Scranton business parkin an effort to beat another employee’s best running time. Assuming heruns with an average velocity of 10 ft/s, and he completes 4 laps in 5minutes,a. What is the perimeter of the business park in feet?b. In meters?( 1 ft = 0.3048 m )
The car moves in a straight line such that for a short time its velocity is defined by v = (2t^3 + 3 t) m/s, where t is in seconds. a. What is its position in meters when t = 2 seconds, when t = 0, so = 5 meters? b. What is its acceleration in m/s^2 when t = 2 seconds, when t = 0, so = 5 meters?
A ball dropped from a height of 30 cm, takes 0.6067 s to reach the ground. What is the acceleration due to gravity (g) at that place in S.I. units ? Select one: O a. 163 O b. 1.63 Oc. 9.8 O d. 0.988 The time of fall (t) of a free falling object is directly proportional to the height (h)
b. A car's velocity as a function of time is given by V (t) = a+ Bßt² , where a = 3.00m/s and B= 0.100 m/s³. I. Calculate the average acceleration for the time interval t= 0 to t= 5.00s. Calculate the instantaneous acceleration fort=0 and t = 5.00s. II. III. Draw the Velocity - Time graph for the car's motion between t=0 and t= 5.00s. ||
1. A vehicle drives at a constant speed of 215km/h for 42.3 seconds, accelerates by 29.4m/s2 for 5.00s. And finally, slows down to the stop. The entire movement takes 88.6 seconds. A. Make a vector-speed diagram or graph as a function of time for the situation. B. Determine the maximum speed. C. Determine the total displacement. 2. Two 9.82km separate trains travel on parallel tracks in opposite directions, one to the other. Train A has a speed of 5.87 km/h at departure and accelerates at a rate of 0.29m/s2. Train B has a speed of 20.3m/s at departure and an acceleration of 0.69m/s2. A. Make a diagram or graph position according to time for the situation. B. Determine when trains meet.
For questions 2 & 3, use the following problem: An object moves on a straight line so that after t seconds its distance in millimeters (mm) from its original position is given by x(t) =1? – 2t. 2. Find the acceleration at t = 3: А. 1 mm/sec? В. 2 mm/sec? C. O mm/sec? D. 4 mm/sec? E. 6 mm/sec? F. None of these. 3. At what time does the object change direction? A. t=1 sec B. t=2 sec C. t= 0.5 sec D. t= 4 sec E. Never F. None of these.
Q1.An electron, in a picture tube of a TV set, travelling in a straight line, accelerates uniformly from speed 4.3x10^4 to 9.0x10^6 m/s along a lenght of 2.3 cm. (15) a. How much time does the electron spend in this 2 cm region? b. What is the magnitude of the electron's acceleration?
Physics 30S Science & Technology 2240 Grant Ave. Winnipeg. MB R2C IL6 Shaflesbury High School Motion: Speed/Velocity & Acceleration Ad V = At a = Average Velocity, 1. A man jogs 5.0 km (5000 m) in 27 minutes. a) What is the time interval (At) in seconds? b) Calculate his average speed in metres per second (m/s). Average Acceleration, At 2. An object has a position of 13 metres west. 5.0 seconds later it's at 7 metres east. a) What was the initial position? b) What was the change of position or displacement (Ad)? c) What was the average velocity? 3. A world class sprinter runs 100.0 m in 8.90 s. What was his average speed? 4. A hiker gets lost in a forest. He walks half-way around a circle with a radius of 2.1 km in 2.0 hours. a) What distance did he walk? b) What was his average speed? c) What was his displacement? d) What was his average velocity? WE S C-2rr 5. A car has an average highway speed of 90 km/h or 25 m/s. At this speed; how long will it take to drive to Kenora which is 190…
2. A cheetah moving in a constant acceleration covers the distance between two points 70.0m apart in 7.00s. Its speed as it passes the second point is 15.0m/s a. What is its speed at the first point? b. What is its acceleration?