16) ,9m/s mlm Before After m=9 kg and speed V and i's behind a bloce of mass M-27kg and speed of 0.50m/s. as shown in the tigure. The Surface is friction es, and the blocks suddenly collide and couple. After the collision, the blocks have a A block of mass common Speed of Oc90 m/s. Itow much cinetic energy was lost

Notice how much an effect speed has on kinetic energy, due to its dependence on speed squared. The kinetic energy of the fast-moving baseball that you found in the previous step skip is about the same, even a little more, than the walking student, even though baseball has much less mass. This is because of the baseball's much greater speed. Here is another example that shows how speed greatly affects the kinetic energy. One type of rifle used by the military fires a bullet with a mass of 0.000356 kg that exits the rifle's barrel with a speed of 910 m/s. What is the bullet's kinetic energy (in J)?  ______J Again, notice how higher speed has a huge effect on kinetic energy. Let's try a few more examples of reasoning with kinetic energy. Two rocks are moving at the same speed. Rock #2 has    the mass of rock #1. The kinetic energy of rock #2 is then  ____________      the kinetic energy of rock #1. Two identical cars have the same mass. Car #2 is moving at    the speed of car #1. The…

A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, what is the potential energy of the loaded cart at the height of the seat top?  Referring to the previous item, what will happen to the potential energy of the cart if its mass increases four times?

At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m. (a) If a particular payload has a mass of 28 kg, what is its potential energy relative to the bottom of the shaft? (b) How fast will the payload be traveling when it reaches the bottom of the shaft? Convert your answer to mph for a comparison to highway speeds.

A hiker of mass 73 kg is going to climb to the top of Mount Tam, which has an elevation of 2,574 ft. a) If the hiker starts climbing at an elevation of 545 ft, what will their change in gravitational potential energy be, in joules, once they reach the top? Assume the zero of gravitational potential energy is at sea level.  b) Repeat the above calculation for the change in gravitational potential energy, but assume the gravitational potential is zero at the top of the mountain.

You pick up a book of mass 1 kg from the floor, lift it to eye level (of height 1.6 m), walk the book 10 m across the room, and then set the book down on a table (of height 1.1 m). The total change in potential energy of the book is

Point Height (y) (m) Speed (v) (m/s) Potential Energy (J) Kinetic Energy (J) Mechanical Energy (round off to the nearest thousands) A 8 m 0 m/s 3430 J 0 J 3000 J B 3 m 8.8 m/s 1470 J 1936 J 3000 J C 2 m 9.9 m/s 980 J 2450 J 3000 J   - Calculate the ratio of the mechanical energy at B and mechanical energy at A (EB/EA) and (EC/EB). What do these ratios tell you about the conservation of energy? - Is the mechanical energy conserved between A and B? Explain. - Is the mechanical energy conserved between B and C? Explain