1 / 10

2.2 Resultant force

07 June 2014. 2.2 Resultant force. Try these sums. 6 + 5 = 15 – 10 = 3a + 5a = 100N – 50N = 40 – 40 = 100N – 200N = 50kN – 25kN = 1kN – 500N = . 07 June 2014. 2.2 Resultant force. 6 + 5 = 11 15 – 10 = 5 3a + 5a = 8a 100N – 50N = 50N 40 – 40 = 0 100N – 200N = -100N

catrin
Download Presentation

2.2 Resultant force

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 07 June 2014 2.2 Resultant force Try these sums 6 + 5 = 15 – 10 = 3a + 5a = 100N – 50N = 40 – 40 = 100N – 200N = 50kN – 25kN = 1kN – 500N =

  2. 07 June 2014 2.2 Resultant force 6 + 5 = 11 15 – 10 = 5 3a + 5a = 8a 100N – 50N = 50N 40 – 40 = 0 100N – 200N = -100N 50kN – 25kN = 25kN 1kN – 500N = 500N (1k = 1000)

  3. 07 June 2014 2.2 Resultant force • What is a resultant force? • What happens if the resultant force is zero? • What happens if there is a resultant force? Voyager 2 was launched in 1974. Since then it has had no main rocket engine to power it. The spacecraft is now at the edge of the Solar System travelling at 60 000 mph! How can it keep going?

  4. Resultant force • A single force used to represent all the forces on an object. Resultant = 10N 10N 20N What is the missing resultant force? 10N = ? 20N

  5. Newton’s 1st Law of motion When the resultant force on an object is zero: • An object stays still • Has a constant velocity Explain how a skater carries on moving with no effort on ice. Which force is zero on ice?

  6. When the resultant force is not zero the object changes its velocity. • What happens when the: • Weight is more than the Lift force? • Lift is more than the Weight? • Weight equals the Lift?

  7. Accidents • Draw a diagram to show the lorry hitting the car. Include: • The direction the lorry was travelling • The force needed to stop the lorry • The force on the car.

  8. When the resultant force on an object is zero: • An object stays still • Has a constant velocity Investigation Use a trolley to look at Newton’s 1st Law. • How can you get the trolley to move at a constant speed? • Which forces must be balanced for this to happen? books Trolley

  9. Copy this table Key Points

More Related