# Energy and Work

Pro Problems > Physics > Energy and Work# Featured Pro Problems

What happens when the astronaut bails out of his rocket just before it takes off.

A two variable problem involving kinetic energy of someone speeding up

Calculate height of an object's drop based on what happens in the first two seconds of the drop

Calculate the speed of a car given its initial height at the top of a hill

Determine the speed at which an object crash lands on Planet X

A sled starts at the top of a hill and slides down. Use the information to calculate the coefficient of friction

Calculate the work done while lifting a box

A rocket launch problem; a projectile problem solved as an energy problem

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Blast Off, Rocket Launch# Understanding Coronavirus Spread

A Question and Answer session with Professor Puzzler about the math behind infection spread.

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