Question

2. The ratio of energy required to accelerate a car from rest to 20 ms to the energy needed to acceleratefrom 20ms to 40ms is1) 1:12) 1:33) 1:24) 1:4​

Answer 1

Answer:

option 2) 1:3

Explanation:

kinetic energy is proportional to v²

ratio of energy =( 20²-0²) / (40²-20²)

=400/1200

= 1:3