Quelpr
1 markMotions

CAPE Physics Unit 1 · 2009 · Paper 2 · Question 1(a)(i)

A body is subjected to a resultant force F for a time t, causing a change in momentum Δp.

Write down an equation which shows the relation between the resultant force F on a body, the time t for which the force acts and the change in momentum, Δp, of the body.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)(ii)Define the term 'impulse'.[1 mark]
  2. 1(b)(i)Calculate the initial weight of the rocket.[1 mark]
  3. 1(b)(ii)Calculate the final weight of the rocket.[1 mark]
  4. 1(b)(iii)Calculate the time taken for the fuel to be burned.[2 marks]
  5. 1(c)(i)On the grid on the page opposite, plot a graph of the upward Force (F)/N versus Time (t)/s. Draw the BEST curve through the points.[3 marks]
  6. 1(c)(ii)On the SAME graph draw a line to represent the variation with time of the total weight of the rocket while the fuel is burning.[2 marks]
  7. 1(c)(iii)From the graph, read off the time delay between the firing of the rocket and lift off. Write this value in the space below.[1 mark]
  8. 1(c)(iv)On the graph, shade the area that represents the change in momentum of the rocket during the first 4 seconds after the rocket is fired.[1 mark]
  9. 1(c)(v)Estimate the value for the change in momentum of the rocket.[2 marks]

More practice: the rest of this paper · more Motions questions · all CAPE Physics Unit 1 past papers