A rock is thrown vertically upward from the origin of a reference frame. The rock reaches the peak of its trajectory and then it returns back to the origin where it comes to rest. Using the upward direction aspositive, select True or Fálse for the following statements.True v The velocity of the rock is positive throughout the whole motion.- The acceleration of the rock is zero at the peak of the trajectory.TrueTrueThe position of the rock is positive or zero throughout the whole motion.False The acceleration of the rock is negative throughout the whole motion.Submit AnswerIncorrect. Tries 6/10 Previous Tries

(a) The velocity of the rock is positive throughout the whole motion. False: The velocity of the…

Answered: A rock is thrown vertically upward from…

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)...

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1) A student drove to the university from her home and noted that the odometer reading of her car increased by 15.8 km. The trip took 25.9 min. a) What was her average speed, in meters per second? b) If the straight-line distance from her home to the university is 10.3 km in a direction 25° south of east, what was the magnitude of her average velocity in meters per second? c) If she drove back home using the same path she took out to the university and arrives 7.9 h after she first left home, what was her average speed for the entire trip, in meters per second?
The table below shows position data for 8 different objects. Let NORTH be the positive direction. Based on the data, determine which objects were NORTH OF THE ORIGIN THE ENTIRE TIME, which objects were SOUTH OF THE ORIGIN THE ENTIRE TIME, and which objects were AT REST THE ENTIRE TIME. For each scenario choose all that apply. At (s) 0 1 2 3 4 NORTH of the origin (the whole time) SOUTH of the origin (the whole time) AT REST (the whole time) (ft) -84 -82 -80 -78 -76 r2y (mi) -32 -20 -8 4 16 A r3y (m) -34 -34 -34 -34 -34 > 2 r4y (cm) 10 10 10 10 10 15y (km) 72 70 52 55 50 гбу (yd) 0 0 0 0 r7y (mm) 90 88 86 84 82 ray (in) -72 -95 -96 -74 -56
You have exactly 6 minutes 30 seconds to get to your next class on time and that classroom is 134 m east of where you are right now. First you run to your dorm room at an average velocity of 4.88 m/s to the south to pick up your calculator and your dorm room is 322 m south of where you were initially. What average velocity (magnitude only) do you now need to run from your dorm room to your classroom to arrive exactly on time? 0.89 m/s 4.88 m/s 1.08 m/s 1.17 m/s
FILL IN THE BLANKS Problem In a relief operation mission involving a helicopter h distance above the ground traveling with a horizontal velocity vx. What should be the expression for the horizontal distance dx at which you release the relief package so that it will arrive to the survivors at the right place? (Neglect the effect of air resistance) Solution To determine this, we must first derive the time it takes for the relief package to reach the survivors. We use this equation -h = vinitial-yt + (1/2)ay = _____ If we just drop the package from the helicopter, the equation above becomes ___________ = ________ + (1/2)ay _______ Substituting ay = -g then simplifying results to t = sqrt(_______ /_________ ) which is the time it takes for the object to reach the ground. Since the package will just travel at a constant velocity in the x-axis, thus dx = vxt Substituting the time taken by the package to reach to ground results to: dx = (_________)( sqrt (________/________ ) ) which is the…
part 1 of 2 During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.66 km/s at an initial inclination of 38.8° to the horizontal. The acceleration of gravity is 9.8 m/s². How far away did the shell hit? Answer in units of km. SUBMIT ANSWER part 2 of 2 How long was it in the air? Answer in units of s.
A student fires a cannonball vertically upwards with a speed of 31.0m/s. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the cannonball. What was the cannonball's maximum height? unit How long did the cannonball rise? unit What was the cannonball's total flight time? unit
a m/s t A particle moves in a straight line with the acceleration shown in the figure. Knowing that the particle starts from the origin with v, = -2 ms, (a) construct the v-t and X-1 curves for 0
You have exactly 4 minutes 12 seconds to get to your next class on time and that classroom is 218 m east of where you are right now. First you run to your dorm room at an average velocity of 5.08 m/s to the south to pick up your calculator and your dorm room is 248 m south of where you were initially. What average velocity (magnitude only) do you now need to run from your dorm room to your classroom to arrive exactly on time? 5.08 m/s 1.63 m/s 1.85 m/s 1.31 m/s
A rocket is launched at an angle of 60.0° above the horizontal with an initial speed of 95 m/s. It moves for 3.00 s along its initial line of motion with an acceleration of 32.0 m/s2. At this time its engines fail and the rocket proceeds to move as a free body. a. Find the maximum altitude reached by the rocket. _______m b. Find its total time of flight. _______ s c. Find its horizontal range _______ m
You have exactly four minutes 29 seconds to get to your next class on time and the classroom is 166 m east of where you are right now. First you run to your dorm room at an average velocity of 4.39 m/s to the south to pick up your calculator and your dorm room is to 16 m south of where you were initially. What average velocity (magnitude only) do you now need to run from your dorm room to your classroom to arrive exactly on time?
A stone is thrown straight up with an initial speed of 24.0 m/s. Neglect air resistance. a). At t= 1.0 s, what are the magnitudes and directions of the velocity and acceleration of the stone? Is the speed of the stone increasing or decreasing? b). At t= 3.0 s, what are the magnitudes and directions of the velocity and acceleration of the stone? Is the speed of the stone increasing or decreasing?
A car traveling at 33.0 km/h speeds up to 45.0 km/h in a time of 7.00 s. The same car later speeds up from 63.0 km/h to 75.0 km/h in a time of 7.00 s. Let the +x direction point in the direction the car is traveling. Calculate the magnitude a, of the constant acceleration for the first time interval. Determine the distance de traveled by the car during the first time interval. Calculate the magnitude ay of the constant acceleration for the second time interval. m/s² m/s² E

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