A car travelling at 35.0 km / hr speeds up to 45 km / hr in a time of 5.00 s. The same car later speeds up from 65 km / hr to 75 km / hr in
a time of 5.00 sec.
a. Calculate the magnitude of the constant acceleration for each of
these intervals.
b. Determine the distance traveled by the car during each of these
time intervals.

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Which type of basaltic lava flow has a fairly smooth