Find the resultant (magnitude and direction) of these
forces: 300 N at 00 and 400 N at
1500.
After falling from a cliff that is 100 m high, a 30 kg rock
hits the ground below. Neglecting air resistance, how fast was it
moving just as it hit?
How much heat will it take to completely melt 2 kg of lead that
is at 2270 C?
What is the mutual attractive gravitational force between two
people, each with a mass...