A bobsled has a momentum of 4000 kg•m/s to the south. Friction on the track reduces its momentum to 2500 kg•m/s to the south. What impulse is
applied to the bobsled by the friction?

Asimply means that over time there was some sort of change.

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain