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Questions and Answers
Which of the following is a scalar quantity?
Which of the following is a scalar quantity?
- Velocity
- Force
- Acceleration
- Work (correct)
When is the work done by a force positive?
When is the work done by a force positive?
- When the force is perpendicular to the displacement
- When the force is applied in the opposite direction of the displacement
- When the force is applied in the same direction as the displacement (correct)
- When the force is applied at an angle of 45 degrees to the displacement
What is the unit of measurement for work?
What is the unit of measurement for work?
- Pascal
- Newton
- Joule (correct)
- Watt
Which factor does not affect the kinetic energy of an object?
Which factor does not affect the kinetic energy of an object?
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Study Notes
Scalar and Vector Quantities
- Temperature is a scalar quantity.
- Time, mass, and density are also scalar quantities.
Work and Energy
- Work done by a force is positive when the force and displacement are in the same direction.
- The unit of measurement for work is the joule (J).
- Work is a scalar quantity.
Kinetic Energy
- The kinetic energy of an object is not affected by the shape of the object.
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