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What type of quantity is work in physics?
What type of quantity is work in physics?
- Vector, having both magnitude and direction.
- Pseudoscalar, having magnitude and a directional pseudovector.
- Scalar, having only magnitude and no direction. (correct)
- Tensor, having multiple components and directions.
When a ball is thrown upwards, what is the work done by the gravitational force on the ball?
When a ball is thrown upwards, what is the work done by the gravitational force on the ball?
- Positive, equal to the weight of the ball multiplied by the distance to the ground.
- Depends on the mass of the ball.
- Negative, equal to the weight multiplied by the displacement in the upwards direction. (correct)
- Zero, as there is no net displacement in the vertical direction.
In physics, work is defined as the energy transferred to or from an object via the application of force along a displacement. Which of the following statements about work is true?
In physics, work is defined as the energy transferred to or from an object via the application of force along a displacement. Which of the following statements about work is true?
- Work equals the product of the force strength and the distance traveled when the force is constant and aligned with the direction of motion. (correct)
- Work done by a gravitational force is always negative when an object moves upwards.
- Work is always positive when a force is applied in the direction of displacement.
- Work done is given by the sum of force and displacement vectors.
The SI unit of work is:
The SI unit of work is:
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$W = F ullet s ullet \cos(\theta)$ represents:
$W = F ullet s ullet \cos(\theta)$ represents:
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