2. Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same speed. The ratio of the kinetic energy of Y to that of X is:

A) 1:1

B) 2:1

C) 4:1

D) 9:1

E) 1500:1

Question

Hailey

Physics

10 February, 05:57

2. Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same speed. The ratio of the kinetic energy of Y to that of X is:

A) 1:1

B) 2:1

C) 4:1

D) 9:1

E) 1500:1

+2

Answers (1)

Know the Answer?

Anton Wilkerson · Answer 1

Answer:C

Explanation:

let the speed be v for both mass x and mass y

mass (x) = 500kg

mass (y) = 2000kg

Kinetic energy (mass (x)) = (500 x v^2) / 2

Kinetic energy (mass (x)) = 250v^2

Kinetic energy (mass (y)) = (2000xv^2) / 2

Kinetic energy (mass (y)) = 1000v^2

Ratio of kinetic energy y to x = 1000v^2:250v^2

=1000v^2 / 250v^2

=4/1=4:1

2. Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same speed. The ratio of the kinetic energy of Y to that of X is:A) 1:1B) 2:1C) 4:1D) 9:1E) 1500:1

2. Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same speed. The ratio of the kinetic energy of Y to that of X is:

A) 1:1

B) 2:1

C) 4:1

D) 9:1

E) 1500:1