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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.
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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
At time zero, a green car and a red car start from rest on a straight road from the same position in adjacent lanes. The green car moves with a constant speed of \( 21 \text{ m/s} \) and the red car accelerates uniformly at a rate of \( 1.5 \text{ m/s}^2 .\) Which car is ahead \( 10 \) seconds later?
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.
A car initially at rest starts to travel on a straight road. The car starts moving with a constant acceleration of \( 12 \text{ m/s}^2. \) After accelerating for \( 4 \) seconds, the driver applies the brakes, and the car decelerates at a constant rate of \( -6 \text{ m/s}^2 .\) From the point the car's brakes are applied, how long does it take for the car to come to a complete stop?
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.
A body rises vertically up to a height of \( 45 \text{ m} \) in \(3\) seconds, then falls back to the point of projection, with a constant acceleration during its entire movement. Assuming that the air resistance is negligible, is the following statement true or false?
"During its entire movement, the acceleration of the body is \( 6 \text{ m/s}^2,\) and its average velocity is \( 25 \text{ m/s}. \)"
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.
Cars \( A \) and \( B \) are moving in the same direction in adjacent straight lanes. If car \( A \) has a bigger acceleration than car \( B, \) does it mean that car \( A \) is faster than car \( B? \)
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.
Something that is accelerating is \(\text{_________}.\)