eCosmology

Physics Questions... approximate masses of things?

It is not homework for me, but i'm trying to help someone with their homework and I don't really know Physics enough to be certain with the answers I think are right; I don't want to give them the wrong answer. What is the approximate mass of an automobile? A. 10^1 kg B. 10^2 kg C. 10^3 kg D. 10^6 kg Which object weighs approximately 1 newton? A. dime B. paper clip C. physics student D. golf ball The length of a high school physics classroom is probably closest to A. 10^-2 m B. 10^-1 m C. 10^1 m D. 10^4 m Which object has the most inertia? A. a 0.001-kilogram bumblebee traveling at 2 meters per second B. a 0.1-kilogram baseball traveling at 20 meters per second C. a 5-kilogram bowling ball traveling at 3 meters per second D. a 10.-kilogram sled at rest If anyone knows any of them, thank you in advance.

Public Comments

1. C. 10^3 kg. Often called 1 metric ton. D. Golf ball. 1 Newton worth of weight is about 102 grams of mass on earth. My guess is that a golf ball is slightly less. C. 10^1 meters. Would you ever guess ten meters? D. a 10 kg sled at rest. Linear inertia and mass are the exact same concept at common speeds. Speed doesn't influence inertia until it is a relativistic speed, significant fraction of the speed of light.