A 13-KG SLED IS MOVING AT A SPEED OF 3.0M/S. AT WHICH OF THE FOLLOWING SPEEDS WILL THE SLED HAVE TWICE AS MUCH KINETIC ENERGY

sorry about the capitals letters

Respuesta :

  4.2m/s 
KE =(1/2)mv^2 
insert your numbers to find how much kinetic energy you have. 
then double that number and solve for v 
which gives you how fast the sled will have to go in order to reach that kinetic energy