Hey guys, can you please help me solve this one - I can do a, b,c no problem but
ID: 2114737 • Letter: H
Question
Hey guys, can you please help me solve this one - I can do a, b,c no problem but got stuck there... Can you please show me what working is needed to so hopefully I can figure out how to do it too.
1. A car has a total mass of 1233.6 kg including the wheels; each of the 4 wheels has a mass of 16.4 kg. The car starts from rest, travels in a straight line reaching a final velocity of 15.4 m/s in 14.2 s.
Calculate the
(a) acceleration of the car.
(b) the distance the car travels in reaching the 15.4 m/s from rest.
Each wheel has a radius of 0.45 m.
The wheels can be treated as though they have the same moment of inertia as uniform disks of the same mass and radius. The wheels do not slip.
Calculate the
(c) total translational kinetic energy of the car, KT at the final velocity.
(d) total rotational kinetic energy of the 4 wheels, KR at the final velocity.
The ratio KT / KR = 37.6
(e) What would this ratio have been if the final velocity had been 30.8 m/s?
From its final speed of 15.4 m/s the car%u2019s excellent brakes are applied, the wheels lock
(stop rotating) and the car slides to rest. The total frictional force on all the tyres is 7.43 kN.
Calculate the
(f) distance the car travels before coming to rest.
(g) coefficient of kinetic friction between the road and the tyres.
Suppose the car had reached 15.4 m/s and then tried to take a wide bend without accelerating or braking, a bend that we can treat as a circle of radius 32.0 m. The coefficient of static friction between the wheels and the road is 0.69.
(h) Show with calculation whether the car would have taken the bend safely, or would have skidded out of control.
Explanation / Answer
do i need to tell only about d ,e, f,g ?