Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 18 (Q.No. 44)
44.
A vehcile was stopped in two seconds by fully jamming the brakes. The skid marks measured 9.8 metre's. The average skid resistance coefficient will be
Discussion:
2 comments Page 1 of 1.
Kamal kant katwal said:
8 years ago
t=2 sec
S=9.8 m
F=?
Now w*f=(w*a)/g
Hence, f=a/g.
From v=u+at
If v=0,then u=-at,
Now, v^2 - u^2=2aS
Puting above values
a=2S/ t^2.
Now with the help of given data
a=4.9, hence f=4.9/9.81= 0.499= 0.5Answer.
S=9.8 m
F=?
Now w*f=(w*a)/g
Hence, f=a/g.
From v=u+at
If v=0,then u=-at,
Now, v^2 - u^2=2aS
Puting above values
a=2S/ t^2.
Now with the help of given data
a=4.9, hence f=4.9/9.81= 0.499= 0.5Answer.
Veeru said:
8 years ago
Please Explain me.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers