0:12:56Question 19Not yet answeredMarked out of 1.00Flag questionTipsWhen walking on a tightrope, circus performers often carry a very long horizontal pole with weights dangling down off each end of the pole. The effect of carrying this type of pole is to:Question 19Answera.make the task easier for the performer by decreasing their moment of inertia about the rope and lowering their centre of gravityb.make the task more difficult for the performer by decreasing their moment of inertia about the rope and raising their centre of gravityc.none of the optionsd.make the task easier for the performer by increasing their moment of inertia about the rope and lowering their centre of gravitye.make the task more difficult for the performer by increasing their moment of inertia about the rope and raising their centre of gravity

4.Question 4In the "pole in the barn" example done in the video, even though Alice's pole is 10 meters long, and Bob's barn is 8 meters long, Bob thinks that Alice's pole will fit completely inside as she goes through the barn. Why does Alice think Bob is wrong?1 pointAlice observes a length contraction effect for the barn, making it even shorter than its rest length of 8 meters.Bob's crazy.Alice observes her pole to increase in length as she travels toward the barn.

4.Question 4In the "pole in the barn" example done in the video, even though Alice's pole is 10 meters long, and Bob's barn is 8 meters long, Bob thinks that Alice's pole will fit completely inside as she goes through the barn. Why does Alice think Bob is wrong?1 pointAlice observes her pole to increase in length as she travels toward the barn.Alice observes a length contraction effect for the barn, making it even shorter than its rest length of 8 meters.Bob's crazy

pole vaulter swings up to launch over the bar. The force from the pole pulls his body upward.What is the direction of this force?

A pole vaulter swings up to launch over the bar. The force from the pole pulls his body upward.What is the direction of this force?toward his bodytoward the poleSubmit

rigid and uniform one meter long rod AB held in horizontal position by two strings tied to its ends and attached to the ceiling. The rod is of mass 'm' and has another weight of mass 2 m hung at a distance of 75 cm from A. The tension in the string at A is :