- 
                  
Physics
 - 
                  
Energy
 - 
                  
Age 14-15
 - 
                    
level: 9-11
 - 
                  
English
 
Author's Instructions
Simple pendulum, Energy conversion
- 
                  
Physics
 - 
                  
Energy
 - 
                    
Age 14-15
 - 
                    
level: 9-11
 - 
                  
English
 
Author's Instructions
Simple pendulum, Energy conversion
