A Porsche 944 Turbo has a rated engine power of 217^hp. 30% of the power is lost in the drive train, and 70% reaches the wheels. The total mass of the car and driver is 1450^kg , and two-thirds of the weight is over the drive wheels. What is the maximum acceleration of the Porsche on a concretesurface where mu8=1.00?
What is the speed of the Porsche at maximum power output?
If the Porsche accelerates at amax, how long does it takeuntil it reaches the maximum power output?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.