A constant horizontal force is applied to a block, moving it a distance across a horizontal floor at a constant velocity. Which of the following represents the work done by the force ?
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Practise MYP Physics questions on 1.7 Work and Power, Efficiency and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
A constant horizontal force is applied to a block, moving it a distance across a horizontal floor at a constant velocity. Which of the following represents the work done by the force ?
When work is done on an object without any energy being dissipated as heat, the work done is exactly equal to the change in the object's total __________.
Which of the following describes a situation where the work done is negative?
In mechanical systems, 'wasted' energy is most commonly transferred to the surroundings in the form of __________.
True or False: It is possible for a highly advanced machine to have an efficiency of if it uses superconducting materials.
Force
Power
Momentum
Energy
A person holding a heavy book at rest
Air resistance acting on a falling paraglider
An elevator accelerating upwards
A car accelerating forward on a highway
nuclear energy
elastic potential energy
chemical energy
thermal energy
True
False