In the following activity you're asked to lift one end of a relatively small obelisk three feet. You have a lever, a movable fulcrum, weights, and supporting stones at your disposal. Your goal is ...

This is our leverage, and it would be very strange to give it away," Kallas said. She noted that Russian President Vladimir Putin has not changed his goals, so there are no grounds to lift the ...

How does that work?OK, so, a lever is simple machinethat helps you lift something by providingwhat's called a "mechanical advantage".Essentially, it's a way to lift heavy stuffusing less effort ...