Presentation on theme: "Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. Forces GCSE Questions."— Presentation transcript:

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. ( a)Megan’s dog is pulling on his lead. Which arrow, A, B, C or D, shows the direction of this force? Give the letter................................. 1 mark (b)Megan has to pull to keep the dog still. Which arrow shows the direction of this force? Give the letter................................. 1 mark

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. (c)Suddenly the dog’s collar breaks (i)When the collar breaks, the lead moves. Draw an arrow on the diagram to show which way the lead starts to move. 1 mark (ii)Why does the lead move when the collar breaks? 1 mark

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. Answer (a)B (b)D (c)(c)(i) one mark for the arrow pointing to the left accept arrows pointing diagonally downwards and to the left do not accept arrows pointing vertically downwards (ii)answers should refer to an unbalanced force pulling because Megan is pulling it but the dog is no longer pulling in the opposite direction therefore there is a net force acting to the left. OR force D is still acting but force B has been removed

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. Which of the following statements in the list describe forces? a)the movement of a car travelling along a road b)the push of a jet engine on an aeroplane. c)the flow of electricity through a light bulb. d)the weight of a book on a table. e)the pull of a horse pulling a cart. f)the speed of a hockey ball flying through the air.

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. Which of the following statements in the list describe forces? a)the movement of a car travelling along a road b)the push of a jet engine on an aeroplane. c)the flow of electricity through a light bulb. d)the weight of a book on a table. e)the pull of a horse pulling a cart. f)the speed of a hockey ball flying through the air.

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. A girl throws a ball. The diagram shows the path of the ball after she has thrown it. Explain how can you tell from the path of the ball that there is a force acting on the ball? (3 marks)

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. The path is curved (1 mark). The ball is changing direction – therefore it is changing velocity – accelerating (1 mark). Acceleration is evidence of a net force acting (1 mark).

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. Penny sits on a mat at the top of a helter-skelter and then slides down a chute around the outside. (a) Name two of the forces acting on Penny as she slides from point A to point B. (2 marks)

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. (b)As Penny slides from point A to point B, the vertical forces acting on her are balanced. Describe Penny’s speed when the forces acting on her are balanced. (1 mark)

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. (c)Penny goes back for a second go. This time she sits on a smooth cushion instead of a mat. She goes much faster on the cushion. Give the reason for this. (1 mark) (d)On her third go Penny lies back on the cushion with her arms by her side. What happens to her speed? Give the reason for your answer.

Garfield Graphics included with kind permission from PAWS Inc. All Rights Reserved. (a) any two (1 mark each) from: gravity or weight friction reaction force air resistanceaccept ‘drag’ (b) The speed is constant (stays the same) (1 mark) (c) Friction is less- ‘it is smoother’ or ‘it is slippery’ are insufficient (1 mark) (c)Friction (and or air resistance) decreases because she is more streamlined (1 mark) so she accelerates – her speed increases. (1 mark)