Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride. Part A
If a boat and its riders have a mass of 800 kg and the boat drifts in at 1.4 m/s how much work does Sam do to stop it?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

Compare the patterns of the two waves shown in the image. which statement is true about these waves?

Is a copper wire a conductor or insulator?