friend joins the nin children (0,5) and sits on the other end of the seesan He neighs 600N How far from the pivot muat he sit to balance the see saw? a 2m b. 25in c. in d. Sin 6. A moment of SONm is needed to undo a wheel nut The spanner is 20cm long. What force is needed? a- 4N b. 80N c. 400N d. 800N

Question

friend joins the nin children (0,5) and sits on the other end of the seesan He neighs 600N How far from the pivot muat he sit to balance the see saw? a 2m b. 25in c. in d. Sin 6. A moment of SONm is needed to undo a wheel nut The spanner is 20cm long. What force is needed? a- 4N b. 80N c. 400N d. 800N

Answer 1

For the first question, the correct answer is:b. 25inExplanation: To balance the seesaw, the moments on both sides of the pivot must be equal. The moment is calculated by multiplying the force by the distance from the pivot. Since the friend's weight is 600N, and the children's combined weight is 0.5 * 600N = 300N, the distance from the pivot where the friend sits must be twice that of the children's combined distance. Therefore, the correct answer is 25in.For the second question, the correct answer is:c. 400NExplanation: The moment is calculated by multiplying the force by the distance from the pivot. In this case, the moment needed is 80Nm, and the spanner is 20cm long. To find the force needed, we can rearrange the formula: force = moment / distance. Plugging in the values, we get force = 80Nm / 0.2m = 400N. Therefore, the correct answer is 400N.

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