A man pushes on a trunk with a force of 250 newtons. The trunk does not move. How much positive work is done on the trunk?

0.0 J

-250 J

250 J

125 J

Which law of motion accounts for the following statement? "An apple accelerates as it falls from a tree."

A 65kg has the weight force of

If the actual mechanical advantage of a machine is 4.2, and the input force is 10.0 N, what is the output force? 2.3 N 42 N 0.42 N 10 N

How does the electric potential energy change as the electron moves from i to f?

The frequency of the fundamental of the guitar string is 320 Hz. At what speed v do waves move along that string?. Wavelength = 40cm

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?

A pendulum bob is made from a sphere filled with water. What would happen to the frequency of vibration of this pendulum if the sphere had a hole in it that allowed the water to leak out slowly?