Keywords: seat belt, airbag, crumple zones, gravitational potential, kinetic
P2 Topic 4: Momentum, energy, work and
power
This topic looks at:
Define the terms:
What is the momentum of the van?
Stopping Distance
Calculate the kinetic energy of the van.
•Stopping distances
•Momentum
When the car stops, what type of energy is the
kinetic energy transferred into?
•Vehicle Safety
•Work and Power
Thinking Distance
•Potential and Kinetic energy
Braking Distance
momentum (kg m/s) = mass (kg) × velocity (m/s)
kinetic energy = ½ x mass x
velcoity2
Vector Quantity
What is the unit for energy?
What type of energy is the potential energy
changed into when the skateboarder leaves the top
of the ramp?
What safety/protective features are vehicles
fitted with and how do they affect the rate of
momentum?
The ramp is 5m high and the skateboarder is
50Kg. Calculate her potential energy.
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