Show Your Work, with Units and Significant Digits. Use 9.81 M/S/S for Gravity

Marvelous Motion – Homework – Physics

Show your work, with units and significant digits. Use 9.81 m/s/s for gravity.

1) Dr. Presley just bought a new van for CRHS to use for All State trips. When he takes it out for a test drive, he finds that he can accelerate from rest to 26.8 m/s over a distance of 101.8m. What is the acceleration of this van?

2) How long did it take for Dr. Presley to get the van from 60 mph (26.8 m/s)?

3) The pole vault record is 6.15m. How long will an athlete who can make that height be in free fall, assuming the mat is 1.05m high?

4) How fast is the vaulter in #3 going when she hits the mat?

5) A hiker accidentally knocks a rock lose as he makes his way along a canyon. It strikes the ground below at 22.5 m/s. How high was the cliff, assuming no air resistance?

6) In the first Sherlock Holmes movie (the new one is out in a few months), Robert Downey Jr. jumps out a window and into the Thames. The time for his free fall was 1.69s. From what height did our hero jump?

7) In a parade, a horse and rider make their way down the street at a stately .921 m/s for 5.00 minutes. How far do they travel in meters?

Answers: 1) 3.53 m/s/s 2) 7.59s 3) 1.02s 4) 10.0 m/s 5) 25.8 m 6) 14.0 m 7) 276 m