Astronaut Buzz Lightyear normally weighs 215 pounds on Earth. He then travels the a new planet that is twice the size of Earth in diameter, but have the same mass. How much would he weigh on this new planet? Answer should be in pounds.

A50.0-n box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. you observe that at one instant the box is sliding to the right at and that it stops in 2.25 s with uniform acceleration. what magnitude force does friction exert on this box

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

In a system, when potential energy decreases, then entropy also decreases. true false