Momentum Physics Gcse Coursework

Momentum calculations

Here is a worked example:

Two railway carriages collide and move off together. Carriage A has a mass of 12,000 kg and moves at 5 m/s before the collision. Carriage B has a mass of 8,000 kg and is stationary before the collision. What is the velocity of the two carriages after the collision?

Step 1

Work out the total momentum before the event (before the collision):

p = m × v

Momentum of carriage A before = 12,000 × 5 = 60,000 kg m/s

Momentum of carriage B before = 8,000 × 0 = 0 kg m/s

Total momentum before = 60,000 + 0 = 60,000 kg m/s

Step 2

Work out the total momentum after the event (after the collision):

Because momentum is conserved, total momentum afterwards = 60,000 kg m/s

Step 3

Work out the total mass after the event (after the collision):

Total mass = mass of carriage A + mass of carriage B = 12,000 + 8,000 = 20,000 kg

Step 4

Work out the new velocity:

p = m × v, but we can rearrange this equation so that v = p ÷ m

Velocity (after the collision) = 60,000 ÷ 20,000 = 3 m/s

Watch this illustrated podcast on momentum for a summary of how momentum and motion are related:

Skip to main content

Full screenClose full screen

Topic outline

  • General
  • Topic 1

    Topic 1

    Questions for Electricity.

    1. Click here for a list of past paper questions on Electricity. This includes circuit electricity and static electricity.
    2. Click here for the mark scheme to go with the Electricity questions.
  • Topic 2

    Topic 2

    Questions for Forces and Motion.

    1. Click here for a list of past paper questions on Forces and Motion. This includes graphs of motion, Newton's Laws, energy and momentum.
    2. Click here for the mark schemes to go with the Forces and Motion questions.
  • Topic 3

    Topic 3

    Questions for Nuclear.

    1. Click here for a list of questions on Nuclear Physics. This includes details of alpha, beta and gamma decays, the structure of the nucleus and nuclear fission and fusion.
    2. Click here for the mark scheme to the nuclear questions.
  • Topic 4

    Topic 4

    Questions for Unit P2 Stars and Space. This unit applies to the Double and Triple Award Physics courses.

    1. Click here for questions on Stars and Space. This includes the life cycle of a star and the process of nuclear fusion within the core.
    2. Click here for the mark scheme to the Stars and Space questions.
  • Topic 5

    Topic 5

    Questions for Electromagnetism. This unit applies to the Triple Award Physics course only.

    1. Click here for questions on Electromagnetism. This includes electric motors, generators and transformers.
    2. Click here for the mark scheme to the Electromagnetism questions.
  • Topic 6

    Topic 6

    Questions for Unit P3 Light and Sound. This unit applies to the Triple Award Physics course only.

    1. Click here for questions on Light and Sound. This includes reflection, refraction, ray diagrams, sound waves and ultra sound.
    2. Click here for the mark scheme to the Light and Sound questions.
  • Topic 7

    Topic 7

    Questions for Turning Forces. This unit applies to the Triple Award Physics course only.

    1. Click here for questions on Turning Forces. This includes circular motion, orbits and gravitational pull, moments and stability.
    2. Click here for the mark scheme to the Turning Forces questions.
  • Mr Kendal
  • Topic 9
  • Topic 10
Categories: 1

0 Replies to “Momentum Physics Gcse Coursework”

Leave a comment

L'indirizzo email non verrà pubblicato. I campi obbligatori sono contrassegnati *