Question

A man spends 6.9kJ of energy in displacing a body by 46m in the direction in which force he applies force. Calculate the force applied. ​

Answer 1

AnswEr :

• Energy Spent = 6.9 kJ = 6900 J
• Displacement = 46 m

By using the concept of work energy theorem, we can say that Energy is stored in terms of Work Done. Thus,

$\\ \longrightarrow \tt{Work\ Done\ =\ Energy} \\ \\ \\ \longrightarrow \tt{6900\ =\ F.s} \\ \\ \\ \longrightarrow \tt{6900\ =\ 46F} \\ \\ \\ \longrightarrow \tt{F\ =\ \dfrac{6900}{46}} \\ \\ \\ \longrightarrow \underline{\boxed{\frak{Force\ =\ 150\ N}}}$