Question

Car A has twice the mass of Car B; both travel at the same speed. Compared to Car B. Car A has:

o the same the energy
o four times the energy
Otwice the energy
one-half the energy
one-fourth the energy​

Answer 1

Car A has twice the energy

Step-by-step explanation:

Answer 2

Car A has twice the energy of car B.

Step-by-step explanation:

The kinetic energy of an object is given by :

`K=(1)/(2)mv^2`

Where

m is the mass

v is the speed of the object

Car A has twice the mass of Car B. Both travel at the same speed i.e.

`m_A=2m_B`

So,

`(K_A)/(K_B)=((1/2)m_Av^2)/((1/2)m_Bv^2)\\\\=(2m_B)/(m_B)\\\\(K_A)/(K_B)=2\\\\K_A=2* K_B`

So, the kinetic energy of car A is twice of the kinetic energy of car B.