Mechanical Engineering - Automobile Engineering - Discussion
Discussion Forum : Automobile Engineering - Section 1 (Q.No. 28)
28.
The co-efficient of rolling resistance for a truck weighing 63 500 N is 0.018. The rolling resistance to the truck is
Discussion:
12 comments Page 2 of 2.
Rahul Chudasama said:
7 years ago
The rolling resistance can be expressed as;
Fr = c W ------> (1)
where
Fr = rolling resistance or rolling friction (N, lbf).
c = rolling resistance coefficient - dimensionless (coefficient of rolling friction - CRF).
W = m ag.
= normal force - or weight - of the body (N, lbf).
m = mass of body (kg, lb).
ag = acceleration of gravity (9.81 m/s2, 32.174 ft/s2).
The rolling resistance can alternatively be expressed as;
Fr = cl W / r ------> (2)
where
cl = rolling resistance coefficient - dimension length (coefficient of rolling friction) (mm, in)
r = radius of wheel (mm, in)
Fr = c W ------> (1)
where
Fr = rolling resistance or rolling friction (N, lbf).
c = rolling resistance coefficient - dimensionless (coefficient of rolling friction - CRF).
W = m ag.
= normal force - or weight - of the body (N, lbf).
m = mass of body (kg, lb).
ag = acceleration of gravity (9.81 m/s2, 32.174 ft/s2).
The rolling resistance can alternatively be expressed as;
Fr = cl W / r ------> (2)
where
cl = rolling resistance coefficient - dimension length (coefficient of rolling friction) (mm, in)
r = radius of wheel (mm, in)
Ram briksha said:
6 years ago
Coefficient of friction*weight.
= 63500*0.018 = 1143.
= 63500*0.018 = 1143.
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