Describir: The effect of handle height and cart load on the initial hand forces in cart pushing and pulling /

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| |  | ||  \ \\/ //  /_____//   / _ \\   |__  //   |  ___|| \ \\ / // 
| |/\| ||   \ ` //   `____ `   | / \ ||    / //    | ||__    \ \/ //  
|  /\  ||    | ||    /___//    | \_/ ||   / //__   | ||__     \  //   
|_// \_||    |_||    `__ `      \___//   /_____||  |_____||    \//    
`-`   `-`    `-`'    /_//       `---`    `-----`   `-----`      `     
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