Forces, vehicle safety and Kinetic & grav. potential energy 2.0 / 5 based on 1 rating ? PhysicsForcesASAQA Created by: OliviaCreated on: 03-05-13 09:31 Terminal speed is... final steady speed that an object travels at once the forces are balanced 1 of 24 Anything moving through a fluid experiences... drag 2 of 24 The faster the speed... the more drag it experiences 3 of 24 When drag = weight... the object will fall at a steady speed 4 of 24 Resulting force is F = mg - D 5 of 24 Resultant force = F1 - F2 = ma 6 of 24 Stopping distance = Thinking distance + braking distance 7 of 24 Thinking distance = speed x reaction time 8 of 24 Braking distance = . 9 of 24 The shorter the impact time... the greater the impact force 10 of 24 Impact force= rate of change of momentum (ma) 11 of 24 Work done is... energy transfered 12 of 24 Work done = force x distance moved in direction of the force 13 of 24 W = f x d 14 of 24 The area of a force distance graph = work done 15 of 24 Ek = . 16 of 24 Ep = mg h 17 of 24 Power is... the rate of transfer of energy 18 of 24 Power 1 = . 19 of 24 Power 2 = . 20 of 24 Power 3 = . 21 of 24 Efficiency = . 22 of 24 Efficiency is expressed as... a % 23 of 24 Improving efficiency = reducing friction 24 of 24
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