5. A high speed train is moving at 550km/h [E]. If it takes 2.5 minutes for the train to cometo a stop, what was the train's acceleration during this time?a) 220 km/h² [E]b) 220 km/h² [W]c) 13200 km/h² [E]d) 13200 km/h² [W]6. An object is found to have vector components of vx = 16.0 m/s [S] and vy = 12.0 m/s [W].What is the speed of the object?a) 28.0 m/sc) 10.4 m/sc)7. An object, initially at rest takes some time, t, to travel a displacement, Ad. What is themagnitude of the acceleration of this object?2Adtb) 4.00m/sd) 20.0 m/s2Adtb)2Ad2ܠܰܐܘt2Ad8. An object is launched from the edge of a cliff before falling into the water below. At aparticular instant, its speed is found to be half of its launch speed. Where must the objectbe along its trajectory?a) Ascendingc) At its max heightb) Descendingd) Not enough information9. A vehicle is driving on a highway, driving at 100km/h, pointed [North 35° West]. What arethe North/South and East/West components of this motion (in km/h, in that order)?a) 81.9, 57.4b) 57.4, 81.9c) 81.9, 70.0d) 70.0, 57.4

Initial speed of train u=550km/h[E]Time t= 2.5 minutes=( 2.5/60) hoursFinal speed of the train…

5. A high speed train is moving at 550km/h [E]. If it takes 2.5 minutes for the train to come to a stop, what was the train's acceleration during this time? a) 220 km/h² [E] b) 220 km/h² [W] c) 13200 km/h² [E] d) 13200 km/h² [W]

5. A high speed train is moving at 550km/h [E]. If it takes 2.5 minutes for the train to come to a stop, what was the train's acceleration during this time? a) 220 km/h² [E] b) 220 km/h² [W] c) 13200 km/h² [E] d) 13200 km/h² [W]

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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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

Question

5. A high speed train is moving at 550km/h [E]. If it takes 2.5 minutes for the train to come
to a stop, what was the train's acceleration during this time?
a) 220 km/h² [E]
b) 220 km/h² [W]
c) 13200 km/h² [E]
d) 13200 km/h² [W]
6. An object is found to have vector components of vx = 16.0 m/s [S] and vy = 12.0 m/s [W].
What is the speed of the object?
a) 28.0 m/s
c) 10.4 m/s
c)
7. An object, initially at rest takes some time, t, to travel a displacement, Ad. What is the
magnitude of the acceleration of this object?
2Ad
t
b) 4.00m/s
d) 20.0 m/s
2Ad
t
b)
2Ad
2
ܠܰܐܘ
t
2Ad
8. An object is launched from the edge of a cliff before falling into the water below. At a
particular instant, its speed is found to be half of its launch speed. Where must the object
be along its trajectory?
a) Ascending
c) At its max height
b) Descending
d) Not enough information
9. A vehicle is driving on a highway, driving at 100km/h, pointed [North 35° West]. What are
the North/South and East/West components of this motion (in km/h, in that order)?
a) 81.9, 57.4
b) 57.4, 81.9
c) 81.9, 70.0
d) 70.0, 57.4

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