THIS IS URGENT A football coach wants to figure out which of his players can push a tackle sled with the most force. Plan an investigation that will help the coach. Be sure to address the questions below and include everything that needs to be measured and calculated before, during, and after his players run the drill.

• What are the independent variables?
• What are the dependent variables?
• What are the controlled variables?
• What tools would you use?
• How will you record your measurements?
• How much data do you need to collect?
• How might forces change throughout the practice?