Estimate the escape velocity of the galaxy from the solar circle, assuming that the galaxy’s matter is spherically distributed, and that the galaxy has a flat rotation curve at a speed of 240 km/s out to a distance of 20 kpc.

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Avalue that describes how heavy an object is and is related to the force of gravity is