How do noise canceling headphones work

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane