- A rocket car with mass Mhas an engine that provides a thrust force T n Newtons of T=T,e The drag forces (in Newtons) on the car ac modeled by E kv The parameters M. To, a, and k are all known constants The car is initially at rest vlien at -0, dhe engne s fred movng the ca horizontally Write the differential equation that describes the elociry of the car and solve it to obtain velocity of the car as a function of tiine

1. Two masses m, and m, are connected by a string which passes over a massless, frictionless pulley. Mass m, > m,. When released from rest the acceleration of the system is: т+ m, а. д m- m 1 m,- m. 1 2 b. g m,+ m, m. С. д m,- m m,m, d. g т,-т, т, е. д m,+ m, 1

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