A-LevelPhysicsWork, energy and power9702/12 · May/June 2020 · Q151 Mark
In which situation is work done on an object?
AThe object slides with a constant velocity along a horizontal frictionless surface in a vacuum.
Bperson holds the object at arm's length and at a fixed height above the ground.
Cperson pushes the object up a frictionless ramp.
DThe stationary object floats partially submerged in water.
✓ Correct answer
C: person pushes the object up a frictionless ramp.
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