Tu sei qui

Intro to Circular Motion. Una risorsa per il CLIL di Fisica in lingua inglese

red - Di seguito viene proposta una risorsa sul moto circolare uniforme. La risorsa può essere utilizzata nelle classi in cui sono attivi dei percorsi CLIL di Fisica in lingua inglese.

1. What is needed in order to make an object turn or move in a circle?

2. What is the difference between centripetal force and centrifugal force?

3. A communication satellite is in a circular orbit around earth.  If the speed of the satellite is constant, the force acting on the satellite is  <circle one> (zero / decreasing / points towards the center of the circle / points in the direction the satellite is moving)

4. While swinging a weight attached to a string over his head, a student notices that the smaller the circle radius is for the weight and string, the __________________ the centripetal force.

5. A car goes around a turn tracing out a quarter of a circle while turning.  If the car were to make the turn again, but go twice as fast around it, what would happen to the centripetal force?

6. Centripetal force is any force causing an object to move in a circle. Give two examples of other forces that we have learned about that could be acting as centripetal forces.

7. A satellite is orbiting the Earth at a distance of 6,700,000 meters from the center of the Earth. If the time to make one revolution around the Earth is 5450 seconds, what is the centripetal acceleration (note: this is the acceleration due to gravity at this point)

8. Using the information from problem #1, what is the centripetal force of the satellite if tits mass is 500 kg?

9. What is the centripetal force needed to make a 61-kg ice skater traveling at 4m/s turn in a circle of radius 4 meters?

10. A 75-kg passenger rides a roller coaster.  While traveling through a 12-m loop, the person is briefly up-side-down.  If the roller coaster travels at a speed of 11.5 m/s, what is the centripetal force on the rider?

11. A student swings a toy airplane around on a string in a horizontal circle.  The toy airplane has a mass of 1.0 kg and the radius of the circle is 1.0 meter.  The toy airplane has a speed of 1 m/s.  Answer the following questions

12. What is the centripetal force?

13. If the student swung the plane faster and gave it a speed of 2 m/s, what is the centripetal force?

14. If instead, the student swung the plane at 1 m/s, but let out the rope to 2 meters, what would be the centripetal force on the plane?

15. If instead, the student swung the plane at 2 m/s, but let out the rope to 2 meters, what would be the centripetal force on the plane?

16. What if instead, the student used a heavier plane (m=2kg) and the student let out the rope to 2 meters while spinning the plane at 2 m/s?

17. A centripetal force of 12 N, makes a 2-kg bird fly in a circle.  If the radius of this circle is 4 meters, determine…

  • The speed of the bird.
  • The time it takes the bird to complete one loop.

18. A 1.0 kg rock is swung in a horizontal circle of radius 1.5 meters, at the end of a rope.  If one complete revolution takes 0.8 seconds,

  • What is the speed of the rock?
  • What is the centripetal acceleration of the rock?
  • What is the centripetal force of the rock?
  • What object exerts this centripetal force?
Categorie: 
rss facebook twitter google+

Categorie news