1. Baseline (Aiming for 4): List the factors
that affect the stopping distance of a car including
braking and thinking distances.
Further (Aiming for 6): Describe the relationship between speed and both thinking and braking distance.
Challenge (Aiming for 8): Explain the relative effects of changes of speed on thinking and stopping distances.

4. Example question Equations you will need: F=ma & 2as=V2-U2
1) A 800Kg ford focus can apply a force of 5000N of braking force.
a) At what rate can the car negatively accelerate (decelerate) to 0m/s?
b) If the car is travelling at 30m/s, what distance will it travel whilst coming to a stop?
a= F/m
a= 5000N/800Kg
a= 6.25m/s2
2as=V2-U2
s= (V2-U2)/2a
s= (02-302)/2 x 6.25
s= 72m

5. Now try these Equations you will need: F=ma & 2as=V2-U2
1) A 500Kg ford fiesta can apply a force of 4000N of braking force.
a) At what rate can the car negatively accelerate (decelerate) to 0m/s?
b) b) If the car is travelling at 20m/s, what distance will it travel whilst coming to a stop?
2) A 2500Kg lorry can apply a force of 6000N of braking force.
a) At what rate can the lorry negatively accelerate (decelerate) to 0m/s?
b) b) If the lorry is travelling at 20m/s, what distance will it travel whilst coming to a stop?
3) What effect does the increase in mass have on the braking distance?

6. Now try these Equations you will need: F=ma & 2as=V2-U2
1) A 500Kg ford fiesta can apply a force of 4000N of braking force.
a) At what rate can the car negatively accelerate (decelerate) to 0m/s?
b) b) If the car is travelling at 20m/s, what distance will it travel whilst coming to a stop?
a= F/m
a= 4000N/500Kg
a= 8m/s2
2as=V2-U2
s= (V2-U2)/2a
s= (02-202)/2 x 8
s= 25m

7. Now try these Equations you will need: F=ma & 2as=V2-U2
2) A 2500Kg lorry can apply a force of 6000N of braking force.
a) At what rate can the lorry negatively accelerate (decelerate) to 0m/s?
b) If the lorry is travelling at 20m/s, what distance will it travel whilst coming to a stop?
a= F/m
a= 6000N/2400Kg
a= 2.5m/s2
2as=V2-U2
s= (V2-U2)/2a
s= (02-202)/2 x 2.5
s= 80m

8. Fall distance / cm
Reaction time / ms 1 45 26
230 51
323 76
394 2 64 27
235 52
326 77
396 3 78 28
239 53
329
399 4 90 29
243 54
332 79
402 5
101 30
247 55
335 80
404 6
111 31
252 56
338 81
407 7
119 32
256 57
341 82
409 8
128 33
260 58
344 83
412 9
135 34
263 59
347 84
414 10
143 35
267 60
350 85
416 11
150 36
271 61
353 86
419 12
156 37
275 62
356 87
421 13
163 38
278 63
359 88
424 14
169 39
282
361 89
426 15
175 40
286 65
364
429 16
181 41
289 66
367 91
431 17
186 42
293 67
370 92
433 18
192 43
296 68
373 93
436 19
197 44
300 69
375 94
438 20
202
303 70
378 95
440 21
207 46
306 71
381 96
443 22
212 47
310 72
383 97
445 23
217 48
313 73
386 98
447 24
221 49
316 74
389 99
449 25
226 50
319 75
391
100
452