IGSCE Physics answers - pearson.com

ANSWERS297 UNIT 1 ANSWERSCHAPTER 1 1 8 m/s 2 a 10 500 m ( km)b 105 000 m (105 km)c 630 000 m (630 km) 3 4000 s (Snails can actually move faster than this! At a more realistic 4 mm/s ( m/s) it would only take the snail 400 s or 6 minutes 40 seconds.) 4 a graph D b graph C c graph A d graph B 5 distancetime 6 (m)time (s) 7 a The car is moving at constant velocity (speed).b Time interval between first and seventh drip is 15 s (6 s) so average speed is 135 m 15 s = 9 m/s. 8 a 0012345510152025303540velocity (m/s)time (s)b Distance travelled is given by the area under the graph.

on caravan weight normal reaction force air resistance pull of caravan on car forward force from engine 9 a Load force on spring (newtons) Length of spring (cm) Extension of ... tyres and the road surface: the condition of the tyres and the road surface – if the road surface is wet, icy or oily

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