40540
| Question | Answer |
| resultant force (net force) | the size of the overall force on an object |
| contact force | when two objects touch |
| thrust | the forward or upward force (lifting) provided by propellers, rocket engines and by hand-held objects i.e screwdriver |
| air resistance (drag) | the reaction force made by air when a body tries to move its way through the air. i.e run |
| Weight | the pull of the earth on a mass, caused by gravity and measured in newtons |
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