# Marvin's challenge

**Classical Mechanics**Level 2

Marvin the Martian places a block on a frictionless plane that makes a 60 degree angle with the ground. He releases the block and measures the acceleration. He then sends you a radio message that arrives a few minutes later. In this message he challenges you to place a block on a frictionless plane and adjust the plane's angle so that your block's acceleration is equal to his. At what angle do you set the plane? (Use: 9.8 meters per second squared as Earth's surface gravity; 3.7 meters per second squared as Mars' surface gravity.) Choose the closest integer angle value.