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Module 2. Physics
A force of 15N is needed to move a body of mass 30kg along a footpath with uniform velocity. Find the coefficient of dynamic friction.(take g as 10m/s/s).
•  1/20.
•  1/2.
•  20.

rizkaramat asking:
•  please somebody explain


Community comments: 9
chris146
Posts: 7
25.04.2012 / 13:36
15N force. mass of 30kg = 300N
15/300 = 1/20
alberto
Posts: 8
07.04.2013 / 13:34
coefficient of dynamic friction = FORCE / WEIGHT.
THEREFORE FORCE = 15N AND WEIGHT IS 300N AS IT HAVE TO BE CONVERTED FROM MASS 30KG TO WIEGHT BY USING THIS SIMPLE EQUATION WEIGHT=MASS*GRAVITY.
arslan1995
Posts: 3
30.10.2015 / 02:22
I've been taught to always convert grams into Kilograms and leave kg as they are, why is it different here.
dimky
Posts: 509
30.10.2015 / 23:02
Hello arslan.

I don't see any grams here.
Edmaster001
Posts: 1
03.11.2015 / 15:12
mate there are no grams
RuseofBabulal
Posts: 1
03.11.2015 / 18:43
well guys, where I'm from we don't deal with grams. Only ounces.
arslan1995
Posts: 3
26.11.2015 / 13:50
i will merk all u lots.
Brian Dyas
Posts: 2
30.09.2021 / 22:08
Since no one has been on here for a while is there now a better site ?
Jordi
Posts: 160
01.10.2021 / 12:17
what do you mean everyone is here they just refrain from commenting ;P
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