Amotorcycle is moving at a constant velocity of 15 meters/second. then it starts to accelerate and reaches a velocity of 24 meters/second in 3 seconds. what’s the acceleration of the motorcycle over this time? use .

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.