How can I solve 1-D kinematics problems with limited resources?

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SUMMARY

The discussion focuses on solving 1-D kinematics problems in a Physics A class, highlighting essential equations needed for calculations involving uniform acceleration. Key examples include determining the time for an airplane to reach take-off speed of 61.0 m/s with an acceleration of 1.50 m/s², and calculating the effects of gravity on a stone dropped from 490 m. Participants emphasize the importance of familiarizing oneself with the equations of motion under constant acceleration, which are typically found in physics textbooks.

PREREQUISITES
  • Understanding of basic kinematics concepts
  • Familiarity with equations of motion under constant acceleration
  • Ability to perform unit conversions (e.g., km/h to m/s)
  • Basic algebra skills for solving equations
NEXT STEPS
  • Study the three primary equations of motion: \( v = u + at \), \( s = ut + \frac{1}{2}at^2 \), and \( v^2 = u^2 + 2as \)
  • Practice problems involving free fall and acceleration using real-world scenarios
  • Explore online resources or videos explaining 1-D kinematics
  • Review physics textbooks or reliable online platforms for comprehensive kinematics coverage
USEFUL FOR

Students in high school physics courses, particularly those studying kinematics, as well as educators seeking to provide additional resources for teaching these concepts.

Imabur.
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Homework Statement


I have a problem worksheet for my 'Physics A' class. It deals with 1-D Kinematics, which we are just getting into so I am not very sure what equations I need to use. I'm not asking for someone to answer them for me, but to maybe give me a list of a few equations that would help me answer my problems.

A few examples that I have are:

An engineer is to design a runway to accommodate airplanes that must gain a ground speed of 61.0 m/s before they can take off. If these planes are capable of a uniform acceleration of 1.50 m/s2

a) how long will it take them to achieve take-off velocity;​
b) what must be the minimum length of the runway?​

OR

A stone is dropped from an airplane at an altitude of 4.90*102 m. The stone required 10.0 s to reach the ground. At what rete does gravity accelerate the stone?

OR

A driver of a car going 90.0 km/h N, suddenly sees the lights of a barrier 40.0 m ahead. It takes the driver 0.750 s to apply the brakes, and the maximum acceleration during braking is 10.0 m/s2 S. Determine if the car hits the barrier.

Homework Equations



I just need basic equations. How to find how long it will take something to fall, or how to find the acceleration or velocity.

The Attempt at a Solution



The only solutions I was able to find were the simple ones that I could do in my head.

Q. A boy walks 13.0 km in 2.0 h. What is his speen in km/h?

A. 6.5 km/h.

OR

Q. On a baseball diamond, the distance from home plate to the pitcher's mound is 18.5 m. If the pitcher is capable of throwing a ball at 38.5 m/s, how much time does it take a ball to reach home plate?

A. 0.481 s.
 
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Thank you, this helps out a lot. Yes, they would probably be in a textbook, but my shcool doesn't seem to think it's necessary to buy Physics textbooks, and the one worksheet with the basic equations that i needed is the one i seemed to lose. Since, I do not have a textbook to refer my work to, this seems like perfect forum to take part in.
 
You're welcome.

There's a 4th equation too, it results from equating the two expressions for vave in that link from post #2.

... my school doesn't seem to think it's necessary to buy Physics textbooks ...

Wow.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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