mathsgirl

Thanks for this. So, when the arrow reaches its top height, the kinetic energy has been turned into gravitational potential energy and there is a pause before it turns back to kinetic energy. The velocity of the arrow JUST before it hits the ground is 49.5 ms-1. When it penetrates the ground, the kinetic energy is turned into sound energy and heat. But I still don't know how to work out the deceleration. My poor brain hurts sso much! any help appreciated!

Hi there, I am also trying to answer the last section of this question, and I still can't, even after all your helpful suggestions! I have absolutely no, no, no clue! Please can you help? I'm racking my brains and theres nothing there! I only need help with this section: "calculate its deceleration as it penetrates the earth" thanks so much!