stopping distances

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how can you investigate friction?

by using a forcemeter to pull blocks along different surfaces

what does it take to stop a vehicle with more mass?

more force

what is increased if the driver tired or has been drinking alcohol or taking drugs

reaction time

what is breaking distance?

the distance the car travels while it is slowing down

what is thinking distance?

the distance the car travels while the driver reacts to the danger and applies the brakes

what happens if 2 vehicles with the same breaks try to stop at the same time?

the one with the greater mass will travel further while it is braking

what would you need to keep the same in the investigation of friction?

the size of the block, the mass of the block, the speed at which you pull it

what is stopping distance?

thinking distance + braking distance

what affect does reaction time have on thinking distance and braking distance

thinking distance = increases (if reaction time is slow), braking distance = no change

what affect does the speed have on the thinking time and braking distance?

thinking distance = increases, breaking distance increases

what affect does the mass of the vehicle have on think time and breaking distance?

thinking distance = no change, braking distance = increases

what affect does the state of brakes have on thinking distance and braking distance

thinking distance = no change, braking distance = increases if brakes not working properly

what affect does the amount of friction between tyres and road have on thinking distance and braking distance?

thinking distance = no change, braking distance = increases if friction is less

what affect does the state of the road have on thinking distance and braking distance?

thinking distance = no change, braking distance = increases if the roads surface is slippery

what does it take for a car to come to a stop?

time and the car is still moving during this time

what is important for road safety?

understanding the factors that affect stopping distances


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