- #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
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 ?