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- University physics volume 1
- Unit 1. mechanics
- Motion in two and three dimensions
- Relative motion in one and two
An elephant is located on Earth’s surface at a latitude
Calculate the centripetal acceleration of the elephant resulting from the rotation of Earth around its polar axis. Express your answer in terms of
the radius
of Earth, and time
T for one rotation of Earth. Compare your answer with
g for
The radius of the circle of revolution at latitude
is
The velocity of the body is
for
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A proton in a synchrotron is moving in a circle of radius 1 km and increasing its speed by
(a) What is the proton’s total acceleration at
t = 5.0 s? (b) At what time does the expression for the velocity become unphysical?
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A propeller blade at rest starts to rotate from
t = 0 s to
t = 5.0 s with a tangential acceleration of the tip of the blade at
The tip of the blade is 1.5 m from the axis of rotation. At
t = 5.0 s, what is the total acceleration of the tip of the blade?
with respect to the tangent to the circle of revolution directed inward.
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A particle is executing circular motion with a constant angular frequency of
If time
t = 0 corresponds to the position of the particle being located at
y = 0 m and
x = 5 m, (a) what is the position of the particle at
t = 10 s? (b) What is its velocity at this time? (c) What is its acceleration?
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A particle’s centripetal acceleration is
at
t = 0 s. It is executing uniform circular motion about an axis at a distance of 5.0 m. What is its velocity at
t = 10 s?
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A rod 3.0 m in length is rotating at 2.0 rev/s about an axis at one end. Compare the centripetal accelerations at radii of (a) 1.0 m, (b) 2.0 m, and (c) 3.0 m.
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A particle located initially at
undergoes a displacement of
What is the final position of the particle?
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The position of a particle is given by
(a) What are the particle’s velocity and acceleration as functions of time? (b) What are the initial conditions to produce the motion?
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A spaceship is traveling at a constant velocity of
when its rockets fire, giving it an acceleration of
What is its velocity
s after the rockets fire?
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A crossbow is aimed horizontally at a target 40 m away. The arrow hits 30 cm below the spot at which it was aimed. What is the initial velocity of the arrow?
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A long jumper can jump a distance of 8.0 m when he takes off at an angle of
with respect to the horizontal. Assuming he can jump with the same initial speed at all angles, how much distance does he lose by taking off at
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A mountain biker encounters a jump on a race course that sends him into the air at
to the horizontal. If he lands at a horizontal distance of 45.0 m and 20 m below his launch point, what is his initial speed?
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Which has the greater centripetal acceleration, a car with a speed of 15.0 m/s along a circular track of radius 100.0 m or a car with a speed of 12.0 m/s along a circular track of radius 75.0 m?
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A geosynchronous satellite orbits Earth at a distance of 42,250.0 km and has a period of 1 day. What is the centripetal acceleration of the satellite?
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Two speedboats are traveling at the same speed relative to the water in opposite directions in a moving river. An observer on the riverbank sees the boats moving at 4.0 m/s and 5.0 m/s. (a) What is the speed of the boats relative to the river? (b) How fast is the river moving relative to the shore?
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Challenge problems
World’s Longest Par 3. The tee of the world’s longest par 3 sits atop South Africa’s Hanglip Mountain at 400.0 m above the green and can only be reached by helicopter. The horizontal distance to the green is 359.0 m. Neglect air resistance and answer the following questions. (a) If a golfer launches a shot that is
with respect to the horizontal, what initial velocity must she give the ball? (b) What is the time to reach the green?
a.
, b.
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When a field goal kicker kicks a football as hard as he can at
to the horizontal, the ball just clears the 3-m-high crossbar of the goalposts 45.7 m away. (a) What is the maximum speed the kicker can impart to the football? (b) In addition to clearing the crossbar, the football must be high enough in the air early during its flight to clear the reach of the onrushing defensive lineman. If the lineman is 4.6 m away and has a vertical reach of 2.5 m, can he block the 45.7-m field goal attempt? (c) What if the lineman is 1.0 m away?
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A truck is traveling east at 80 km/h. At an intersection 32 km ahead, a car is traveling north at 50 km/h. (a) How long after this moment will the vehicles be closest to each other? (b) How far apart will they be at that point?
a.
,
b.
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Questions & Answers
I'm interested in biological psychology and cognitive psychology
what does preconceived mean
How can I develope my cognitive domain
why is communication effective
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
please i need answer
Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
compare and contrast skinner's perspective on personality development on freud
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
generally amnesi how long yrs memory loss
interpersonal relationships
What would be the best educational aid(s) for gifted kids/savants?
treat them normal, if they want help then give them.
that will make everyone happy
Saurabh
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Source:
OpenStax, University physics volume 1. OpenStax CNX. Sep 19, 2016 Download for free at http://cnx.org/content/col12031/1.5
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