Correct answer: The heavier car will change the train's direction or speed more than the lighter car will. Possible Answers: Patrick pushes a vase off of the countertop. Steven pulls a door open so his mother can walkthrough. Jeffery and his little brother crash into each other while rollerblading.
Samantha and her twin sister play tug-of-war; it ends in a tie. Correct answer: Samantha and her twin sister play tug-of-war; it ends in a tie.
Explanation : In the scenarios, "Samantha and her twin sister play tug-of-war; it ends in a tie. Explanation : An unbalanced force causes a change in motion, speed, direction, or movements because of unequal force or strength that is applied to one side of an object.
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Which one of the velocity-time graphs best describes the motion of the box? Support your answer with sound reasoning. See Answer Graph B is correct. The box first accelerates with a negative downward acceleration until it hits the water. Upon hitting the water, the box experiences a balance of forces 50 N downwards due to gravity and 50 N upwards due to the water.
Thus, the box will finish its motion moving with a constant velocity. Graph B depicts both the initial negative acceleration and the final constant velocity. Which one of the following dot diagrams best describes the motion of the falling box from the time that they are dropped to the time that they hit the bottom of the pool? The arrows on the diagram represent the point at which the box hits the water.
See Answer Tape A is correct. Upon hitting the water, the box experience a balance of forces 50 N downwards due to gravity and 50 N upwards due to the water. Diagram A depicts both the initial downward acceleration and the final constant velocity. Several of Luke's friends were watching the motion of the falling box. Being "physics types", they began discussing the motion and made the following comments. Indicate whether each of the comments is correct or incorrect? Support your answers.
And then the fourth statement, an object acted on an by a unbalanced force will always acclerate in the direction of the unbalanced force So, i'll leave you to think about those statements, and figure out which of those statements are actually true. It might be none of them, it might be all of them, or some combination of them. Now that's try to think about each of these statements. So first of all an object in motion will slow down, unless it is acted on by an unbalanced force in the direction of motion.
Well this, at least, on a first cut kind of seems consistant with our everyday experience. If i'm pushing some furniture across the room, so let's say that this is, that this is the carpet of my house, and i'm pushing a television set -let's say it's one of those old school heavy television set- so i'm pushing a television set , the only way that I can keep it in motion is that I keep pushing on it. So let me draw my force of pushing my force of pushing.
So let's call that right there the force of Sal pushing the television set. So the only way that I can keep the only way that I can keep my television set moving seems like if I keep applying this pushing force on it.
And I were to stop doing that, it seems like it will slow down. So on a first cut everday experience, this seems like it would actually maybe be true. It only seems that way, because i'm actually not accounting all of the forces in this situation. There is not just the force of me pushing.
There is also the force of friction. So i'll call that, there is also the force of friction. And if I want to keep this TV moving at a constant veloctiy, my force of pushing that make that the vectors look about the same magnitude, becuase they need to be the same magnitude If I want to keep my television set at a constant velocity in the direction that i'm pushing, I have to exactly offset the force of the force of friction. Unbalanced forces When two forces acting on an object are not equal in size, we say that they are unbalanced forces.
Whether a moving object speeds up, or slows down, depends on the direction of the resultant force: the object speeds up if the resultant force acts in the direction of movement the object slows down if the resultant force acts opposite to the direction of movement.
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