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Excel in math and science
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1D Kinematics
If train A leaves from El Paso at high noon and train B leaves from Dallas at 1 PM, you won't know when they meet unless you master 1D kinematics. What are you waiting for?
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
Concept Quizzes
Suppose that the displacement \(s\) of an aeroplane can be expressed as a function of time \(t\) in the following way: \[ s(t) = 8 t^2 + 10 t .\] What is the magnitude of the acceleration of the object?
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
Point \(P\) moves along the \(x\)-axis in such a way that its position is \(x(t)=6-2t,\) where \(t\) denotes elapsed time. If \(t\) has changed from \(0\) to \(12,\) what is the average velocity of point \(P?\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
Stacey was driving her car at a speed of \(30\text{ mph}\) on a straight avenue, when suddenly she noticed that she had forgotten to bring her purse. So she immediately made a U-turn and headed back to her house. Now she is almost home, and she looks at her watch, recognizing that \(30\) minutes has passed from the moment of the U-turn. If her current speed is \(40\text{ mph},\) what is her average acceleration for the \(30\) minutes on her way back home?
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
John is jogging from his home to the park, and back. If the distance between his home and the park is \(700\) yards and John has jogged for a total of \(14\) minutes, what is his average velocity, \(\vec{v}\)?
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
I'm driving along at a constant speed in my 3-meter-long car when I notice that I am accidentally driving through a red light. If the rear end of my car passes under the light 0.3 seconds after the front end of my car, how fast am I driving in m/s?