2 questions to fill in the blank:
1) in order tocalculate work done, use the ___ of the force which is in the direction of motion.
2) You push against a car stuck in the mud. You will do ___ work unless you are successful in moving the car.
1. Magnitude
2. No or Zero.
1) In order to calculate work done, use the component of the force which is in the direction of motion.
Explanation: When calculating work done, it is important to consider the force applied in the direction of motion. The work done is given by the formula: Work = Force x Distance x cos(θ), where θ represents the angle between the force vector and the displacement vector. Since work is only done when a force acts in the direction of motion, it is necessary to consider only the component of the force in that direction.
To calculate the work done, determine the force acting on an object and find the component of that force that aligns with the direction of the object's displacement. Then multiply this component of force by the distance moved in that direction. This will give you the work done on the object.
2) You push against a car stuck in the mud. You will do no work unless you are successful in moving the car.
Explanation: Work is done when a force is applied and there is a displacement in the direction of the force. In this case, if you push against a car stuck in the mud but the car does not move, there is no displacement in the direction of your force. Therefore, no work is done. Work involves the transfer of energy, and if there is no displacement caused by the force applied, there is no energy transferred, and therefore no work done.
If you are successful in moving the car, then a displacement occurs in the direction of your force, and work will be done.