EQUATIONS P2 Topic 4: Momentum, energy, work and power

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Presentation transcript:

EQUATIONS P2 Topic 4: Momentum, energy, work and power This topic looks at: Stopping distances Momentum Vehicle Safety Work and Power Potential and Kinetic energy Calculate the kinetic energy of the van. When the car stops, what type of energy is the kinetic energy transferred into? Define the terms: Stopping Distance Thinking Distance Braking Distance Vector Quantity What is the momentum of the van? momentum (kg m/s) = mass (kg) × velocity (m/s) kinetic energy = ½ x mass x velocity2 Keywords: seat belt, airbag, crumple zones, gravitational potential, kinetic EQUATIONS What is the unit for energy? What type of energy is the gravitational potential energy changed into when the skateboarder leaves the top of the ramp? The ramp is 5m high and the skateboarder is 50kg. Calculate her potential energy. What safety/protective features are vehicles fitted with and how do they affect the rate of change of momentum? The boy pushes the crate 20m across the floor. Calculate the work done. Keywords: Work, power, momentum, vector quantity, stopping distances, braking distances, thinking distances