Question 7: (1 point) A 15 m long bar is pivoted on the right end and a force of 5 N is applied downwards on the left end. The moment of force is: (a) 3 Nm counter -clockwise (b) 3 Nm clockwise (c) 75 Nm counter -clockwise (d) 75 Nm clockwise

The moment of force (also called torque) is calculated by multiplying the force applied by the perpendicular distance from the pivot point to the line of action of the force.<br /><br />* **Force:** 5 N<br />* **Distance:** 15 m<br /><br />Moment = Force × Distance = 5 N × 15 m = 75 Nm<br /><br />Since the force is applied downwards on the left end and the bar is pivoted on the right end, the bar would rotate clockwise.<br /><br />Therefore, the answer is (d) 75 Nm clockwise.<br />