Q5MCQ Two children are balanced on opp... [FREE SOLUTION]

Chapter 9: Q5MCQ (page 230)

Two children are balanced on opposite sides of a seesaw. If one child leans inward toward the pivot point, her side will
(a) rise.
(b) fall.
(c) neither rise nor fall.

Short Answer

Expert verified

The correct option is (a).

Step by step solution

Concepts

The torque equals the product of the force and the perpendicular distance of the force from the pivot point. When the force comes closer to the pivot point, the magnitude of the torque decreases.

Explanation

When the seesaw is at equilibrium, the net torque on it is zero, i.e., the torque due to the children on both sides of the seesaw creates the same torque at the pivot point.

If one child leans inward to the pivot point, her distance from the pivot point decreases. So, the torque produced by that child decreases.

Therefore, the seesaw rises in her side.

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91影视

Two children are balanced on opposite sides of a seesaw. If one child leans inward toward the pivot point, her side will
(a) rise.
(b) fall.
(c) neither rise nor fall.

Short Answer

Step by step solution

Concepts

Explanation

One App. One Place for Learning.

Most popular questions from this chapter

^{A uniform meter stick with a mass of 180 g is supported horizontally by two vertical strings, one at the 0-cm mark and the other at the 90-cm mark (Fig. 9鈥�82). What is the tension in the string (a) at 0 cm? (b) at 90 cm?}

^{(II) The two trees in Fig. 9鈥�51 are 6.6 m apart. A backpacker is trying to lift his pack out of the reach of bears. Calculate the magnitude of the force}^{\(\vec F\)}^{that he must exert downward to hold a 19-kg backpack so that the rope sags at its midpoint by (a) 1.5 m, (b) 0.15 m.}

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91影视

Two children are balanced on opposite sides of a seesaw. If one child leans inward toward the pivot point, her side will(a) rise.(b) fall.(c) neither rise nor fall.

Short Answer

Step by step solution

Concepts

Explanation

One App. One Place for Learning.

Most popular questions from this chapter

A uniform meter stick with a mass of 180 g is supported horizontally by two vertical strings, one at the 0-cm mark and the other at the 90-cm mark (Fig. 9鈥�82). What is the tension in the string (a) at 0 cm? (b) at 90 cm?

(II) The two trees in Fig. 9鈥�51 are 6.6 m apart. A backpacker is trying to lift his pack out of the reach of bears. Calculate the magnitude of the force\(\vec F\)that he must exert downward to hold a 19-kg backpack so that the rope sags at its midpoint by (a) 1.5 m, (b) 0.15 m.

Recommended explanations on Physics Textbooks

Mechanics and Materials

Space Physics

Modern Physics

Wave Optics

Classical Mechanics

Physical Quantities And Units

Study anywhere. Anytime. Across all devices.

Two children are balanced on opposite sides of a seesaw. If one child leans inward toward the pivot point, her side will
(a) rise.
(b) fall.
(c) neither rise nor fall.

^{A uniform meter stick with a mass of 180 g is supported horizontally by two vertical strings, one at the 0-cm mark and the other at the 90-cm mark (Fig. 9鈥�82). What is the tension in the string (a) at 0 cm? (b) at 90 cm?}

^{(II) The two trees in Fig. 9鈥�51 are 6.6 m apart. A backpacker is trying to lift his pack out of the reach of bears. Calculate the magnitude of the force}^{\(\vec F\)}^{that he must exert downward to hold a 19-kg backpack so that the rope sags at its midpoint by (a) 1.5 m, (b) 0.15 m.}