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11) A shopping cart with a mass of 2 kilograms
accelerates in a straight line from 4 meters per
second to 8 meters per second due to the application
of a force whose duration is 0.5 seconds. What is the
magnitude of this average force?

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it

The air that we breath is made mostly of which gaseous molecule

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?