129 Answered Questions for the topic high school

High School Math Physics B Energy

11/02/15

A 45.2kg boulder falls off a mountain that is 255 m tall. What is the kinetic energy of the boulder when it falls off the cliff?

I know the answer might be 0J but I need help explaining how to get the answer

09/06/14

A runner runs 2.6 km in 9 min and then takes 30 min to walk back to the starting point.

(a) What is the runner's average velocity for the first 9 min? km/h (b) What is the average velocity for the time spent walking? km/h (c) What is the average speed for the whole trip? km/h

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