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1. By applying your physics knowledgeor by providing a counterexample, explain h

ID: 1748869 • Letter: 1

Question

1. By applying your physics knowledgeor by providing a counterexample, explain how you can tell thefollowing statement is false.

A box is in equilibrium. The net force on is measured to be25 N. 2.By applying your physics knowledge orby providing a counterexample, explain how you can tell thefollowing statement is false.

A rock is thrown straight up into the air. At the peak, itsaccleration is zero.
3.By applying your physics knowledge or by providing acounterexample, explain how you can tell the following statement isfalse.

Speed is a vector. 1. By applying your physics knowledgeor by providing a counterexample, explain how you can tell thefollowing statement is false.

A box is in equilibrium. The net force on is measured to be25 N. 2.By applying your physics knowledge orby providing a counterexample, explain how you can tell thefollowing statement is false.

A rock is thrown straight up into the air. At the peak, itsaccleration is zero.
3.By applying your physics knowledge or by providing acounterexample, explain how you can tell the following statement isfalse.

Speed is a vector. 3.By applying your physics knowledge or by providing acounterexample, explain how you can tell the following statement isfalse.

Speed is a vector.

Explanation / Answer

1. At equilibrium, the net force on the box is 0N. 2. The velocity of the rock is zero, not theacceleration. The acceleration due to gravity (g) is constant at-9.8m/s2 3. Vectors have direction. Velocity is a vectorbecause it has a magnitude and a speed. Speed does not; speedis a scalar - the magnitude of velocity. 3. Vectors have direction. Velocity is a vectorbecause it has a magnitude and a speed. Speed does not; speedis a scalar - the magnitude of velocity.