In kinematics, the speed of an object is the magnitude of its velocity; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.
All stories in Speed
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Thank god, 2021 is shorter than 2020 by 1 second — here's why
The Earth is spinning faster than it has at any time in the last 50 years, careful study of our planet reveals. Each ...
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How high-end cameras and algorithms are making escooters safer
This article was originally published by Christopher Carey on Cities Today, the leading news platform on urban mobility ...
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3 wheels, 1 seat: A closer look at Electrameccanica’s 2021 Solo EV
This article was originally published by John Faulkner on Clean Fleet Report, a publication that gives its readers the ...
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The COVID-19 vaccine was developed in less than a year — and that's totally fine
I’m a clinical trials geek. I keep hearing people talk about the seven to ten years it takes to make a vaccine and how ...
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This jellyfish robot can outswim its squishy animal cousin
Scientists have created soft robots inspired by jellyfish that can outswim their real-world counterparts.
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Review: The Levy electric scooter packs swappable batteries and thoughtful design for $499
Electric scooters were finally legalized in New York earlier this month, but they've been a presence in the city for years. ...
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Why these Quasar jets appear to travel faster than light
Quasar jets imaged by the Earth Horizon Telescope (EHT) show galactic movements in unprecedented detail. Movements of vast ...
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Designing for cognitive accessibility: Where to begin
Designing with accessibility in mind is not as difficult as you think. Here are some quick steps to guide you through the ...
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The RadRunner Plus makes my favorite ebike-moped hybrid even better
Rad Power Bikes' RadRunner is my first recommendation to anyone looking for their first ebike. When I reviewed it ...
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How to keep your internet from slowing to a crawl while working from home
So you're at home, working or just generally using the internet more than normal? Here's how to help keep your speed up while ...
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This 3D-printed hypercar runs on electricity and methanol (and costs $2.6M)
The 3D printed Czinger 21C hypercar was given its first public outing today. It has a hybrid drivetrain that uses electric ...
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Engineers bet on hydrogen-fueled zero emission rocket to break land speed record
Engineers behind the British Bloodhound Land Speed Record (LSR) vehicle are turning their eyes to hydrogen power for their ...
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Tesla driver arrested for flossing at 84 mph on autopilot
Autonomous driving looks set to be a part of our motoring future. It sounds great, but it can never account for a driver's ...
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Oyama CX E8D II Review: This folding e-bike gets almost everything right
After testing a few e-bikes this year, it's quickly become apparent that they are the fastest way to get around a ...
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Apple launches the 16-inch MacBook Pro and, yes, it has a 'new' keyboard
Apple has launched its new MacBook: the 16-inch Pro. This has a range of updates, but the most interesting is the company ...
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An engineer explains how supercharged racing yachts go so fast
Sailing used to be considered as a rather sedate pastime. But in the past few years, the world of yacht racing has been revolutionized ...
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Review: The $1,299 RadRunner is part cargo e-bike, part moped, and all fun
The RadRunner is a versatile e-bike that can almost carry as much stuff as a small car - or bring a passenger along for the ...
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Obsessing over first-page load time sabotages ecommerce businesses
A flawed approach to page speed measurement is sabotaging ecommerce sites. There, I said it. Now I know this might be ...
