Question

If a bike and a car are both going at the same speed of 100km/hr, which would go faster

Answer 1

Since both of them are moving with the same speed hence none of them would be faster than either in starting. But as time will pass car would come out to be faster than bike because its momentum is more hence the force of friction required to lower their speed would be greater for car and less for bike.

Because momentum (linear)=mv

Since mass of car is greater therefore amounta of force of friction required to lower its speed would be greater than that of bike. Causing it to move faster than the bike.