Calculations

Calculations - denominator cancels out with the seconds (s)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Here are some hints as you work on calculations. I'm going to set up little tables to show you how I look at problems and how the units will cancel out. A conversion: 6.2 hours to seconds 6.2 hours 3600 seconds 1 hours 6.2 x 3600 = 22320, hours cancel out and the only unit left is seconds, final answer is 22320 seconds An Acceleration Problem: The acceleration due to gravity on Earth is 9.8 m/s 2 . How fast will a skydiver be traveling in m/s after falling for 3 seconds? acceleration = speed/time rearrange to speed = acceleration x time 9.8 m 3 s s 2 9.8 x 3 = 29.4, the meters (m) do not cancel out, and one of the seconds (s) in the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: denominator cancels out with the seconds (s) associated with the "3". Final answer is 29.4 m/s (units are units of speed). A force problem: What is the acceleration of a 20 kg ball that has a force of 2.5 Newtons. Force = mass x acceleration, so acceleration = Force/mass 2.5 N 20 kg changing the unit Newton to kg*m/s 2 , see page 47. 2.5 kg * m 1 s 2 20 kg 2.5 / 20 = 0.125, kg cancel out leaving m/s 2 which are units for acceleration. Final answer is 0.125 m/s 2 ....
View Full Document

Page1 / 2

Calculations - denominator cancels out with the seconds (s)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online