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Acceleration on Curved Path - Lecture Slides | PHYS 121, Study notes of Physics
Material Type: Notes; Class: General Physics I; Subject: Physics; University: New Mexico Institute of Mining and Technology; Term: Fall 2008;
Typology: Study notes
Pre 2010
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Physics questions?
Outline
(1)Acceleration on curved paths (2)Projectile Motion
in 3D
r =3t 2 i− 4t 4
j11t 7
k
What is the instantaneous acceleration at t=2?
v^ and a
a^ = 6
i− 192
j m /s
2
Acceleration not parallel to
velocity
a^ = d v dt
6.1 2D Acceleration
An object undergoes acceleration of
over a 10s interval.
At the end of that time, its velocity is
What was its velocity at the beginning of the interval?
IDENTIFY EQUATION NEEDED:
a)
b)
c)
d) There is more than one correct answer
a^ =2.
i3.
j m /s
2
i 15
j m /s
2
a^
AV
v
dt
v= v
0
a t
r =r
0
v
0
t+
1 2
a t
2
What is the direction of the object’s average acceleration vector for the time interval from t = 0 to t = t 1
A. up and to the left B. up and to the right C. down and to the left D. down and to the right E. none of the above 1
Q
What is the direction of the object’s average acceleration vector for the time interval from t = 0 to t = t 1
A. up and to the left B. up and to the right C. down and to the left D. down and to the right E. none of the above 1
A
The motion diagram shows an object moving along a curved path at constant speed. At which of the points A, C, and E does the object have zero acceleration? A. point A only B. point C only C. point E only D. points A and C only E. points A, C, and E
A
Outline
(1)Acceleration on curved paths (2)Projectile Motion
An object moves at a constant speed in a clockwise direction around a circular track. The geometrical center of the track is at point O. When the object is at point P , which arrow shows the direction of the object’s acceleration vector? A. arrow #1 (directly away from O ) B. arrow #2 (perpendicular to track) C. arrow #3 (in direction of motion) D. arrow #4 (directly toward point O )
P
O
o v a l t r a c k A3.4a
A zoo keeper fires a tranquilizer dart directly at a monkey. The monkey lets go at the same instant that the dart leaves the gun barrel. The dart reaches a maximum height P before striking the monkey. Ignore air resistance. Does the dart hit the monkey?