Edexcel IGCSE Physics 1.29P Newton's third law
Practise Newton's third law by matching action-reaction forces, reading contact-force values and drawing the opposite force direction.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- State paired interaction forces are equal in magnitude and opposite in direction.
- Give the matching force on the other object after a collision or contact interaction.
- Draw or choose an arrow showing the third-law force in the opposite direction.
1.29P Newton’s third law question 1
A crumple zone is a safety feature in a car.
It is a part of the car that is designed to collapse during a collision.
A student investigates the effectiveness of crumple zones.
The student rolls two model cars down a ramp.
Each car comes to rest when it hits a large metal block.
A data logger measures the mean force applied to the car during the collision with the block.
The diagram shows the equipment used in the investigation.
Car 1 has a paper crumple zone at the front.
Car 2 has no paper crumple zone.
The table shows the student's results.
State the magnitude and direction of the force on the metal block, when car 2 collides with the block.
magnitude = N
direction =
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