- #1
Fatima Hasan
- 319
- 14
Homework Statement
A toy car has a mass of 2 kg moves with initial speed of 2 m/s on a rough horizontal plane of μκ=0.14.A spring with constant of 250 N/m is fixed. Which of the following statements is true ?
A) The toy does not approach the spring
B) The toy just touch the spring
![DATA.png](http://[url=https://postimages.org/][img]https://s17.postimg.org/bq53t7rrz/DATA.png)
C) The toy compress the spring
D) The toy back with constant speed on the surface
Homework Equations
ΣF = ma
Fκ = μκ FN
The Attempt at a Solution
ΣF = ma
-Fκ = ma
Fκ = μκ FN
a = - μκg = -0.14 * 10 = - 1.4 m/s^2
vƒ^2 = vi^2 + 2 a d
= 4 - 2*1.4*3 = - 4.4 (negative) --> A) The toy does not approach the spring.
Can somebody check my answer please ?