# Problem: Superman's arch nemesis Lex Luthor pushes Lois Lane horizontally with a speed of 5 m/s off a 35 m tall building. Superman stands on the ground just below the edge of the rood. Ignore air resistance. How fast must he run (at constant speed) to catch Lois just before she hits the ground?

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Superman's arch nemesis Lex Luthor pushes Lois Lane horizontally with a speed of 5 m/s off a 35 m tall building. Superman stands on the ground just below the edge of the rood. Ignore air resistance.

How fast must he run (at constant speed) to catch Lois just before she hits the ground?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Projectile Motion: Horizontal Launch concept. You can view video lessons to learn Intro to Projectile Motion: Horizontal Launch. Or if you need more Intro to Projectile Motion: Horizontal Launch practice, you can also practice Intro to Projectile Motion: Horizontal Launch practice problems.

How long does this problem take to solve?

Our expert Physics tutor, Jeffery took 1 minute and 30 seconds to solve this problem. You can follow their steps in the video explanation above.