Question

A 0.250 kg car rest rolls down a frictionless incline from a starting height of 0.75 m what is the final velocity of the car? SHOW ALL WORK.

Also what difference would it make if it is not frictionless? Please and thank you!

Answer 1

v = 3.83 m/s

Step-by-step explanation:

Given that,

The mass of a car, m = 0.250

It rolls down a frictionless incline from a starting height of 0.75 m

We need to find the final velocity of the car. Let v be the velocity of the car. It can be calculated using the third equation of motion i.e.

`v^2-u^2=2as`

Here,

u = 0 and a = g

`v=√(2gs) \\\\v=√(2* 9.8* 0.75) \\\\v=3.83\ m/s`

So, the final velocity of the car is 3.83 m/s.