#### Could You Bungee-Jump Using Only Magnets?

That’s the premise behind this video of the supposed “first wireless bungee jump.” Let me be real clear: It’s a fake.As the cord stretches, it exerts an upward force on the jumper in the same direction that the ground would push.

#### The NFL's Helmet Tests Are Brainless

So it’s not surprising that the NFL's helmet testing and ranking has had no discernable impact on the incidence of concussions (to say nothing of the incidence of clinically silent injury, which hasn’t been measured at all).

#### Fact-Check the Physics of Captain America Hammering Thanos

If this interaction force is the only force acting on our two humanoids for the same amount of time, Captain America's change in momentum will be exactly opposite that of Thanos.

#### Great Stunt, Spider-Man! Now Let's Fine-Tune the Physics

Now, if we put this vertical acceleration together with the fixed horizontal velocity , we get something special, called projectile motion. On the next jump, I get a vertical acceleration of –6.074, which is closer, but you can see that the fit is pretty janky.

#### 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.

#### What Adam Savage Needs to Know to Fly an Iron Man Suit

That means the pilot can control the suit by just changing the arm positions and not even having to adjust the jet engine thrust. Here is a diagram looking from the side of the flying Iron Man:Notice that there is now a forward component of force from the back jet.

#### Post-Apocalyptic Survival Skills: How to Measure Acceleration

With that, I can find a force-acceleration equation for both masses. With an accelerating mass, the net force is NOT zero. Notice that if the two masses have the same value, the acceleration would be zero meters per second squared (that's good).

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.

#### Calculate the G’s of Using an Ejection Seat to Blast Out of a Jet

Even though the seat is actually accelerating downward (because of the gravitational force), it's good enough to get a linear fit and find an approximate post-rocket acceleration with the slope of this line at a velocity of 19.4 meters per second (43.4 mph).

#### A Physics Analysis of Every Jedi Jump in All of Star Wars

A Physics Analysis of Every Jedi Jump in All of Star Wars. For these Jedi jumps in Star Wars, it's plausible to estimate the distance scale by looking at things like Ewan McGregor (height of 1.78 meters) or Liam Neeson (height of 1.93 meters).

#### Why a (Very Bad and Unsafe!) Playground Stunt Sends Folks Flying

This says that the farther you are from the center of the rotating merry-go-round, the greater the acceleration.

#### Estimate the Friction Coefficient in That Massive Nascar Pile-Up

All I need is to determine the acceleration of a sliding car and I can get a value for the coefficient of kinetic friction between the tire and the road.

#### Mercedes’ EQC SUV Makes Everyday Electric Elite

Mercedes’ EQC SUV Makes Everyday Electric Elite “We wanted to create an everyday car, with a nice dynamic, comfortable driving, a fun car with torque and power, and to have a very safe car,” says engineer Bastian Schult.

#### How to Calculate the Physics in Super Smash Bros. Ultimate

Here is the rule that I have for a jumping Captain Falcon: Yes, that seems like a crazy model, but when I run it I get the following plot (along with data from the video analysis).

#### Aquaman's Insane Leap out of Water Has One Foot in Reality

It is this scene that I will analyze.Aquaman might be able to swim super fast, but once he leaves the water and enters the air there is only one force acting on him—the gravitational force that pulls straight down.

#### Was a Star Wars Escape Pod Really Just a KFC Bucket?

If I had a view of the "falling" model from the side, I could easily get position-time data using video analysis by looking at each frame in the scene.Alas, I don't have that view.

#### How to Easily Locate the Accelerometer in an iPhone

Moving in a circle at a constant speed means there is indeed an acceleration.If we have an object moving in a circle, the acceleration is pointed towards the center of the circle and depends on two things: the angular velocity (ω) and the circular radius (r).