A figure skater on ice spins on one foot. She pulls in her arms and her rotational speed increases. Choose the best statement below.
1. Her angular speed increases because by pulling in her arms she creates a net torque in the direction of rotation.
2. Her angular speed increases because air friction is reduced as her arms come in.
3. Her angular speed increases because her angular momentum increases.
4. Her angular speed increases because her angular momentum is the same but her moment of inertia decreases.
5. Her angular speed increases due to a net torque exerted by her surroundings.
6. Her angular speed increases because her potential energy increases as her arms come in.
Answers: 2
Physics, 21.06.2019 19:40
Abird sitting high in a tree is an example of what type of wnergy
Answers: 2
Physics, 22.06.2019 18:50
Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle can be assumed at 30 deg
Answers: 2
Physics, 22.06.2019 20:30
Which statement best describes the direction of the buoyant force on any object? a. opposite the force of gravity b. in the same direction as the weight c. in the direction of motion of the object d. opposite the direction of motion of the object
Answers: 1
Physics, 23.06.2019 03:00
Current vs. forcewhat type of relationship does this graph show?
Answers: 2
A figure skater on ice spins on one foot. She pulls in her arms and her rotational speed increases....
Mathematics, 19.06.2020 06:57
Mathematics, 19.06.2020 06:57
Advanced Placement (AP), 19.06.2020 06:57
Mathematics, 19.06.2020 06:57
Chemistry, 19.06.2020 06:57
Mathematics, 19.06.2020 06:57
Mathematics, 19.06.2020 06:57
Engineering, 19.06.2020 06:57
Mathematics, 19.06.2020 06:57