Register to reply

Acceleration in g units

by physics newb
Tags: acceleration, units
Share this thread:
physics newb
Sep6-06, 03:34 PM
P: 44
An object is moving on land at a speed of 1020 km/h. This object goes from full speed to a complete stop in 1.4 seconds.
In g units, what acceleration did the object 'experience' while stopping?
My guess is I have to plug in -9.8 m/s into this equation, but I'm not sure how.
Any help? I hope this is the right forum. Thanks
Phys.Org News Partner Science news on
Climate change increases risk of crop slowdown in next 20 years
Researcher part of team studying ways to better predict intensity of hurricanes
New molecule puts scientists a step closer to understanding hydrogen storage
Sep6-06, 03:36 PM
P: 398
1 g = 9.82m/s2

Do you know the formula for acceleration?
physics newb
Sep6-06, 03:37 PM
P: 44
Thanks for the quick reply. I don't know the formula for acceleration, at least not off the top of my head.

Sep6-06, 05:03 PM
Sci Advisor
PF Gold
P: 39,323
Acceleration in g units

acceleration is rate of change of speed. The speed went from 1020 km/hr to 0 km/hr, a change of -1020 km/hr in 1.4 seconds.

You will want to change km/hr to m/s.
physics newb
Sep6-06, 07:13 PM
P: 44
So it accelerated at -283.3 m/s, now do I divide that by the -9.8 m/s, and that's my answer? I came up with 28.91 g units.
physics newb
Sep7-06, 11:49 AM
P: 44
Something just accrued to me. What do I do with the 1.4 seconds? Do I take the 28.91 g units and figure out what the answer would be for 1 second, making it 20.65 g units?
Sep1-08, 11:54 AM
P: 2
Yo so is it 28.91 or 20.65..
so what hall are you in...physics 211!!!

Register to reply

Related Discussions
Fluid Mechanics local acceleration and convective acceleration Advanced Physics Homework 1
Centripetal acceleration, incorporating a change in acceleration around the circle... Introductory Physics Homework 3
Uniform Circular Motion: Centripital Acceleration vs. Acceleration Introductory Physics Homework 4
FAQ:What's the differences between Radiometric Units and Photometric Units? Introductory Physics Homework 2
Maxwell related equations converted from MKSA units to Gaussian units Classical Physics 2