Which of these examples best illustrates Newton’s second law of motion A a 100 lb boy has twice as much inertia as a 200 lb on boy.

B a truck need a more powerful engine then a small car.

C A hockey puck slides easily across the ice.

D A satellite stays in orbit for a long time.

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c