O-LevelPhysicsForces5054/12 · Oct/Nov 2016 · Q51 Mark
A force of 20 N acts on an object of mass 5.0 kg in the forward direction. A second force also acts on the object. The forward acceleration of the object is 3.0 m/s². What is the size and direction of the second force?
A5.0 backwards
B15 backwards
C15 forwards
D35 forwards
✓ Correct answer
A: 5.0 backwards
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