The Dark Knight has some pretty neat gear—but his gadget-enabled stunts require some juice.
same comment about Batman: He's cool because he's just a normal dude, but he's also a superhero. It’s true, he doesn't have superpowers. However, what he, we get to see him use one of his "toys"—his ascender gun. Batman uses it to launch something like a grappling hook, which is connected to a cable. Once it attaches to a high point, an electric motor within the gun winds the cable, pulling Batman up.
Now for the physics calculations: What kind of battery or power source would his ascender need, and how much power would it use? Let's start with a bit of background on energy.One of the key ideas for understanding energy is to define a system of interest, which is the collection of objects we want to study. Once we have a system, we can use one of the most important concepts in physics: the work-energy principle.
That's actually a hard question, but here is my best answer: Energy is not a real thing, but rather a way to keep track of different interactions. Energy also comes in different forms. For example, kinetic energy is associated with the motion of objects, and potential energy is the kind that depends on the position of objects.
So work is a way to add or take away energy from a system. In terms of forces, we define work as the following:
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