Identify which substance is harder to change the temperature.
1. Aluminum or Brass
2. Lead or Iron
3. Silver or Copper

your answer is yx

hope this

~mia

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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the correct choice is a .

do not post any more test or exam questions on

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )