6. The door has the same rotational inertia during each push, because the pivot

Question

6. The door has the same rotational inertia during each push, because the pivot point stays in the sam e place (the hinge). In other words, the door's "resistance" to rotation doesn't change. Push 2 e. Roughly put, push 2 does a causes more rotational motion because it provides a bigger torqu better job of overcoming the door's rotational inertia. the distance from the pivot point to the contact point (where ortional to r (a) How does torque depend on r, inversely proportional to r, or what? (b) Obviously, torque is proportional to F, the force with which you push the door. Given your answer to part (a), what's a good guess for a formula for in terms of r and r

Explanation / Answer

6.

(a) torque is directly proportional to the distance from the pivot point to the contact point where force is applied.

Hence torque (tau) is directly proportional to distance (r).

(b)

Torque is directly proportional to the pushing force .

Write the expression for torque.

Torque (tau) =Force (F)×(r)

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