How Does a Car's Momentum Change If Its Kinetic Energy Doubles?

[Lolagoeslala]

Homework Statement

A car (of constant mass) doubles its kinetic energy while driving down a hill sloped at 45º. The factor by which its momentum changes is answer is 1.4?

 

[Doc Al]

The factor by which its momentum changes is answer is 1.4?

Yes. The factor is √2 ≈ 1.41

 

[Lolagoeslala]

Yes. The factor is √2 ≈ 1.41

Would u get how u got that?

1/2mv^2 = P right?

 

[Doc Al]

$${KE}_1 = 1/2 m v^2_1$$
$${KE}_2 = 2 {KE}_1$$
Find v₂ in terms of v₁.