If the roller coaster starts from rest at A and it's speed increases as a_t = (6 - 0.06s) m/s^2 determine the magnitude of its acceleration when it reaches B where s_B = 40 m.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false