physicsmomentum2 - SPH4U Energy and Momentum Multiple...

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SPH4U - Energy and Momentum Multiple Choice (1 mark each) Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Which of the following is not a unit of energy? a. J d. W s b. e. c. N m ____ 2. In the picture of a roller coaster track shown above, the point where the roller coaster car would be travelling the fastest, under negligible friction is ____ 3. A car with a mass of 1800 kg slows from 42 km/h [E] to 28 km/h [E]. The impulse from the brakes is a. 2.5 × 10 4 N s [E] d. 2.1 × 10 4 N s [W] b. 2.5 × 10 4 N s [W] e. 7.0 × 10 3 N s [W] c. 2.1 × 10 4 N s [E] ____ 4. Two objects of equal mass with the speeds indicated by the vectors below, collide and stick together. Which vector below best represents the velocity of the combined objects after the collision?
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____ 5. Looking at the diagram above, in which part of the orbit is the planet moving the fastest? ____
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