Reducing the Speed Limit Won’t Make Roads Safer for Wildlife

Reducing the Speed Limit Won’t Make Roads Safer for Wildlife

And herein lies the premise: if drivers are moving slowly enough, they will have time to avoid hitting large animals, such as deer and pronghorn, on the road.

Hurling Satellites Into Space Seems Crazy—but Might Just Work

Hurling Satellites Into Space Seems Crazy—but Might Just Work

Before I get to the calculations, let's look at the details of the system and the physics involved.

The Secret to Blowing Massive Soap Bubbles

The Secret to Blowing Massive Soap Bubbles

That's what's happening, physics-wise, when we blow bubbles through a ring at then end of a little plastic wand: the jet forms at our lips and is wider than the soapy film suspended within the ring.

A Weekend at Concours d'Lemons, the World's Worst Car Show

A Weekend at Concours d'Lemons, the World's Worst Car Show

There are oddities like the Yugo–the worst car ever made–so poorly engineered it’s had more of a life as a punchline than a vehicle.If you like cars that never should have never been made, then Concours d’Lemons is a feast for your trash-loving eyes.

Mandalorian vs. TIE Fighter: Who Would Win?

Mandalorian vs. TIE Fighter: Who Would Win?

It's fairly linear, which means the TIE fighter is moving at a roughly steady speed of 117.3 meters per second (262 mph for the Imperials).He's already up to his maximum vertical speed by the time he gets 10 meters off the ground.

How Eliud Kipchoge Pulled Off His Epic, Sub-2-Hour Marathon

How Eliud Kipchoge Pulled Off His Epic, Sub-2-Hour Marathon

On Saturday morning in Vienna, Austria, Eliud Kipchoge, the world's finest marathoner , became the first person in history to run 26.2 miles in under two hours .

Bugatti's Chiron Clocks 305 MPH Thanks to Top Notch Tires

Bugatti's Chiron Clocks 305 MPH Thanks to Top Notch Tires

BugattiBugatti’s new champion is a pre-production prototype of a special edition of the $3 million Chiron , which in its base form is electronically limited to 261 mph and goes from 0 to 60 mph in under three seconds.

Even Physics Textbooks Tend to Get Friction Slightly Wrong

Even Physics Textbooks Tend to Get Friction Slightly Wrong

Let's consider a very basic physics problem involving pushing a block with a frictional force .Let's use these two ideas for some simple physics cases and see what happens.Here is the momentum principle (in 1-D):Rhett AllainNow let's use this.

The Biomechanical Perfection of Simone Biles in Flight

The Biomechanical Perfection of Simone Biles in Flight

And then, pow pow, Biles is in the air, a möbius loop of motion 10 feet off the ground at the apex, more than a second in the air, twisting around her head-to-toe axis three times and flipping over her side-to-side axis twice before, bang!

Self-Parking Garages, Robovans, and More Car News This Week

Self-Parking Garages, Robovans, and More Car News This Week

Speaking of electrics, we watched Ford’s prototype battery-powered Ford F-150 haul a train, saw Cruise delay its plans to launch a robo-taxi service in San Francisco, and inspected financials from Tesla showing that while deliveries are up, so are losses.

Quantum Darwinism Could Explain What Makes Reality Real

Quantum Darwinism Could Explain What Makes Reality Real

One of the most remarkable ideas in this theoretical framework is that the definite properties of objects that we associate with classical physics—position and speed, say—are selected from a menu of quantum possibilities in a process loosely analogous to natural selection in evolution: The properties that survive are in some sense the “fittest.” As in natural selection, the survivors are those that make the most copies of themselves.

How Elite Tennis Players Crank Out Serves at 150 MPH

How Elite Tennis Players Crank Out Serves at 150 MPH

A former tennis pro himself, Kovacs works with some of the best players on Earth to help them wring as much power as possible from their serves.

The Awesome Bowling Robot Is Surely Fake. Here's How to Tell

The Awesome Bowling Robot Is Surely Fake. Here's How to Tell

Motion of the Spinning Arm. I already have an estimate for the launch speed of the ball from the time it takes to get down the lane.

How to Shoot Stellar Slow-Motion Video on Your Phone

How to Shoot Stellar Slow-Motion Video on Your Phone

Many phones let you record HD video (1080p) at even higher frame rates: 240 fps slo-mo has become pretty common among premium devices, like the Pixel 3, the OnePlus 7 Pro, and the Galaxy S9.

SpaceX Recovered Its First Rocket Fairing. Let’s Crunch the Numbers!

SpaceX Recovered Its First Rocket Fairing. Let’s Crunch the Numbers!

So, if the boat can travel at 30 mph and it has 41 minutes to get to the rendezvous spot for the fairing, how big of a target area do you need.

The Physics of the Millennium Falcon's Jump to Hyperspace

The Physics of the Millennium Falcon's Jump to Hyperspace

To estimate the acceleration, we can look at the angular size of the back of the Falcon as it moves away. All I need to do is measure the position of the sides of the Falcon and use that to calculate the angular size in each frame of the video during the jump to hyperspace.

How to Solve a Rubik's Cube in 5 Seconds—or Less

How to Solve a Rubik's Cube in 5 Seconds—or Less

Last month, at a speedcubing competition in Brisbane, he set a new world record of 5.69 seconds in the Average of 5 event, wherein contestants each solve five cubes that have been scrambled according to computer-generated instructions.

Apple Is Finally Fixing the Keyboards on MacBook Pros

Apple Is Finally Fixing the Keyboards on MacBook Pros

More than a year and a half after some MacBook owners began vociferously complaining about broken MacBook keyboards, Apple is making what it says is a material change in the keyboards in its high-end MacBook Pro laptops.

Lilium's 36-Motor Flying Taxi Takes Off for the First Time

Lilium's 36-Motor Flying Taxi Takes Off for the First Time

The aircraft would pitch the fan assemblies vertically for takeoff, then transition them 90 degrees for horizontal flight, with the aerodynamic wing and fuselage providing most of the lift at cruising speed.

The Best Speed Climbers Dash up Walls With a Time-Saving Move

The Best Speed Climbers Dash up Walls With a Time-Saving Move

It's essentially the Fosbury flop of speed climbing: For the athletes like Fishman who can pull it off, the Reza can shave tenths of a second from their overall times.

5 of the Best Demos of Projectile Motion and Its Quirks

5 of the Best Demos of Projectile Motion and Its Quirks

Both balls start with the same vertical position and the same vertical velocity (zero m/s) so that they have the same motion in the vertical direction and hit the ground at the same time. The water will shoot out horizontally, just like projectile motion.

The Physics of the Doppler Effect, Represented as Tiny Balls

The Physics of the Doppler Effect, Represented as Tiny Balls

Notice how the balls look "bunched up" on the left side of the sound source but spread out on the right side? Here is a plot of the apparent ball frequency for a source moving at 4 m/s with the ball sound speed of 10 m/s.

The Physics of Building Jumps in The Matrix

The Physics of Building Jumps in The Matrix

If I assume he jumps like a normal human with an upward speed of 3 m/s (this would give a 0.6 second hang time), then the gravitational field would be 1.4 N/kg.

Safety-Obsessed Volvo Goes After Distracted, Speedy Drivers

Safety-Obsessed Volvo Goes After Distracted, Speedy Drivers

After announcing a few weeks ago that it will limit the top speed of all its new cars to 112 mph, Volvo will roll out efforts to eliminate impaired driving, keep young drivers in check, and help its competitors benefit from its years of safety research.

A New Wave of Brainy Bikes Do Everything but Ride Themselves

A New Wave of Brainy Bikes Do Everything but Ride Themselves

That follows on the release, last summer, of Fox Racing Shox’s Live Valve, an electronically controlled suspension system that reacts almost instantly to terrain, and the year before, an automatic gear-shifting mode for Shimano’s STEPS e-bike drivetrain.

Calculate How Fast Quicksilver Is Moving in X-Men Apocalypse

Calculate How Fast Quicksilver Is Moving in X-Men Apocalypse

If I know the time this takes and the total distance, I can calculate the average speed as: Rhett Allain That seems straightforward, but I need to point out that this is the average speed.

Audi Cars Tell You How Fast to Go to Catch All Green Lights

Audi Cars Tell You How Fast to Go to Catch All Green Lights

The Green Light Optimization Speed Advisory system is an expansion of Audi’s vehicle-to-infrastructure communication system: Since 2016, it has offered “time-to-green,” which tells the driver sitting at a red light how long they have to look at their phone before it’s time to go.

Russian Hackers Go From Foothold to Full-On Breach in 19 Minutes

Russian Hackers Go From Foothold to Full-On Breach in 19 Minutes

Analyzing more than 30,000 attempted breaches in 2018 the company says it detected across its customer base, Crowdstrike measured the time from hackers' initial moment of intrusion to when they began to expand their access, jumping to other machines or escalating their privileges within a victim network to gain more visibility and control.

Launch an 80,000-Pound Sled off an Aircraft Carrier? Sure!

Launch an 80,000-Pound Sled off an Aircraft Carrier? Sure!

Since the sled is launched horizontally, the starting vertical velocity is zero meters per second. If I had the height of the flight deck, I could use that and the vertical motion to find the time it takes to hit the water.

Sprint Sues AT&T, Proving ‘5G’ Is Still Meaningless

Sprint Sues AT&T, Proving ‘5G’ Is Still Meaningless

The four largest US mobile carriers have largely settled on the LTE, or "Long Term Evolution" standard for their 4G networks.