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PHYS 101 Lecture Notes - Lecture 2: The Vancouver Sun

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School
Simon Fraser University
Department
Physics
Course
PHYS 101
Professor
Sarah Johnson

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Phys 101: Tutorial 2. Motion in 2D and Intro to Forces
Instructions: Print and bring with you to your tutorial. Read it over, but do NOT work on until your
tutorial time. Bring a calculator.
Question 1: You ran the Vancouver Sun Run this past year. During the race you managed to run with a
constant speed. Inexplicably, to help pass the time as you ran, you decided to challenge yourself with
the following questions (draw your answers on the race map):
a) What is your displacement vector between the start line and point A?
b) What is the direction of your average velocity between points A and B?
c) What is your instantaneous velocity vector at points, C and D?
d) What is the direction of your average acceleration vector between points C and D?
e) What is your instantaneous acceleration vector at points D and E (or state if it might be zero)?
A
B
C
D
E
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Document Summary

Instructions: print and bring with you to your tutorial. Read it over, but do not work on until your tutorial time. Question 1: you ran the vancouver sun run this past year. During the race you managed to run with a constant speed. Inexplicably, to help pass the time as you ran, you decided to challenge yourself with the following questions (draw your answers on the race map): Question 2: a golfer hits a shot to a green that is at a height that is 3. 00 m above the point where the ball was struck. The ball leaves the club at a speed of 15. 0 m/s at an angle of 40. 00 above the horizontal. It rises to a maximum height and then falls down to the green. Find the velocity of the ball (magnitude and direction) just before it lands. Why: a large truck hits a stationary car.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Related Questions

  1. An object moves clockwise with decreasing speed around an oval track. The velocity vectors at points G and H arc shown.

a. In the space at right, copy the velocity vectors  and  . From these vectors, determine the change in velocity vector .

b. If point H were chosen to lie closer to point G, describe how  would change (direction and magnitude).

 

c. Describe how you would determine the acceleration (direction and magnitude) at point

G. In the space at right, indicate the direction of the acceleration of the object at point G.

d. Copy  and  (placed "tail-to-tail") in the space at right. How does the angle between the acceleration and velocity vectors compare to 900? (i.e., Is the angle greater than, less than, or equal to 90°?)

e.

Generalize your results above and from tutorial to answer the following question:

For an object moving along a curved trajectory, how does the angle between the acceleration and velocity vectors compare to 90° if the object moves with (i) constant speed, (ii) increasing speed, and (iii) decreasing speed?

 


1. What is the difference between speed and velocity?
a. Speed is an average quantity while velocity is not.
b. Velocity contains information about the direction of motion while speed does not.
c. Speed is measured in mph, while velocity is measure in m/s.
d. The concept of speed applies only to objects that are neither. speeding up or slowing down, while velocity applies to every kind of motion.
e. Speed is used to measure how fast an object is moving in a straight line, while velocity is used for objects moving along curved paths.
2. The quantity 2.67 x 103 has how many significant figures?
a.1
b.2
c.3
d.4
e.5
3. If Libby walks 100 m to the right, then 200 m to the left, her net displacement vector points
a. to the right.
b. to the left.
c. has zero length.
d. cannot tell without more information.
4. Velocity vectors point
a. in the same direction as displacement vectors.
b. in the opposite direction as displacement vectors.
c. perpendicular to displacement vectors.
d. in the same direction as acceleration vectors.
e. velocity is not represented by a vector.

1- Define velocity and acceleration in terms of position and time.differentiate between the instantaneous quantities and the averagequantities.

2- how are average velocity and instantaneous velocity related foran object moving at constant and non constant velocity?

3-how would you expect the graph of position versus time to lookfor a car moving at constant and non constant velocity on a track?explain how the graph would be?

4- what would a graph of instantaneous velocity versus time looklike for a car moving with constant velocity? or a car speeding up?or if the car is slowing down?

your help is much appreciated.