Question

a toy car is tied to a string and pulled across a table horizontally. which is the correct free - body diagram for this situation?

Explanation:

Step1: Analyze vertical forces

The toy car is on a table. In the vertical direction, the weight \(w\) (acting downwards) and the normal force \(F_N\) (acting upwards) are present. They should be vertical.

Step2: Analyze horizontal forces

The string exerts a tension force \(T\) horizontally. There is no indication of another horizontal force \(F_N\) in the problem (assuming no friction mentioned, but the key is the direction of forces). In option D, \(F_N\) is vertical (correct) and \(T\) is horizontal (correct). In option A, there is an extra horizontal \(T\) (wrong as only one string - one tension). In option B, \(T\) is vertical (wrong as string is pulled horizontally). In option C, \(F_N\) is not vertical (wrong as normal force on a horizontal table is vertical).

Answer:

D. D