A research team is testing a new type of impact-absorbing material for use in protective helmets. They use a pendulum setup where a 1.0 kg mass is released from a specific height to strike a stationary test helmet containing the new material. The helmet rests on a force plate, which measures the force exerted during the impact. Several trials are conducted, varying the height from which the mass is released.
b. The research team modifies the impact-absorbing material in the helmet, aiming to increase the impact duration while maintaining the same change in momentum of the 1.0 kg mass. Explain how increasing the impact duration affects the average force exerted on the helmet. Justify your answer with reference to the impulse-momentum theorem.
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Create Free Account Log inThis is a free VCE Units 3 & 4 Physics practice question worth 3 marks, testing your understanding of Impulse in collisions. It falls under How do physicists explain motion in two dimensions? in Unit 3: How do fields explain motion and electricity?. Submit your answer above to receive instant AI-powered marking and personalised feedback.
In this unit students use Newton’s laws to investigate motion in one and two dimensions. They explore the concept of the field as a model used by physicists to explain observations of motion of objects not in apparent contact. Students compare and contrast three fundamental fields – gravitational, magnetic and electric – and how they relate to one another. They consider the importance of the field to the motion of particles within the field. Students examine the production of electricity and its delivery to homes. They explore fields in relation to the transmission of electricity over large distances and in the design and operation of particle accelerators. A student-designed practical investigation involving the generation of primary data and including one continuous, independent variable related to fields, motion or light is undertaken either in Unit 3 or Unit 4, or across both Units 3 and 4, and is assessed in Unit 4, Outcome 2. The design, analysis and findings of the investigation are presented in a scientific poster format.
In this area of study, students use Newton’s laws of motion to analyse linear motion, circular motion and projectile motion. Newton’s laws of motion give important insights into a range of motion both on Earth and beyond through the investigations of objects on land and in orbit. They explore the motion of objects under the influence of a gravitational field on the surface of Earth, close to Earth and above Earth. They explore the relationships between force, energy and mass.
Investigate and analyse theoretically and practically impulse in an isolated system for collisions between objects moving in a straight line: FΔt = mΔv.
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