As a 20-Kg Object Moves From Moves $( 2 \tilde { \mathbf { i } } + 5 \tilde { \mathbf { j } } )$

question 43

Multiple Choice

As a 2.0-kg object moves from $( 2 \tilde { \mathbf { i } } + 5 \tilde { \mathbf { j } } )$ m to $( 6 \tilde { \mathbf { i } } - 2 \tilde { \mathbf { j } } )$ m,the constant resultant force acting on it is equal to $( 4 \tilde { \mathbf { i } } - 3 \tilde { \mathbf { j } } )$ N.If the speed of the object at the initial position is 4.0 m/s,what is its kinetic energy at its final position?

• A)62 J
• B)53 J
• C)73 J
• D)86 J
• E)24 J

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