1) The resultant force is the sum of the forces in the same direction minus forces in the opposite direction a) True b) False 2) What is the resultant force of a car with a forward forces of 10N and a friction force of 12N a) 22N forwards b) 22N backwards c) 2N forwards d) 2N backwards 3) What is happening to the motion of the car with a resultant force of 2N backwards a) Speeding up b) slowing down c) not changing speed 4) At point A the object is a) travelling at a constant speed  b) accelerating  (speeding up) c) decclerating (slowing down) d) not moving 5) At point B the object is  a) travelling at a constant speed  b) accelerating  (speeding up) c) decclerating (slowing down) d) not moving 6) At point C the object is  a) travelling at a constant speed  b) accelerating  (speeding up) c) decclerating (slowing down) d) not moving 7) Mrs Robinson is riding her bike at 25m/s she then gets to a hill and her velocity changes to 10m/s what is her change in velocity? a) 10 m/s b) 15 m/s c) 25 m/s d) 35 m/s 8) It takes Mrs Robinson 5s to change her speed by 15m/s what is her acceleration? (hint: "Acceleration" is the correct spelling. Please let me know if you have any further questions or if you need further assistance.ion" is the correct spelling. Please let me know if you have any further questions or if you need further assistance. is change in speed over a time) a) 15 x 5 = 75 m/s2 b) 15 ➗ 5 = 3m/s2 c) 15 + 5 = 20m/s2 d) 15-5 = 10m/s2 9) If an object is falling what is the force pulling it down to earth?  a) Air resistance b) Mass c) Gravitational Force 10) you can describe this graph as  a) Liner and proportional b) Non-liner and proportional  c) Liner and not proportional d) non- liner and not proportional 11) Mrs Williams is driving to school the distance from her house to school is 15 miles it takes her 15 minutes. What was her average speed, in miles per hour? a) 60mph b) 1 mph c) 3.75 mph d) 30mph

Year 8 Forces Revision

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