Physics > QUESTIONS & ANSWERS > Free Particle Model: Review Sheet (U4 review key) (All)
Free Particle Model: Review Sheet (U4 review key)
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Free Particle Model: Review Sheet 1. Consider a collision between a small car and a heavy truck. In such a collision, how does the size of the force exerted on the car by the truck compare with th... e size of the force exerted on the truck by the car? Explain your reasoning. The size of the force of the truck on the small car is the same as the size of the force of the small car on the truck. These two are a 3rd Law pair so they are equal and opposite. 2. a. Draw a velocity-time graph for a ball thrown vertically into the air during its up-and-down motion. b. Draw a force diagram for the thrown ball when it reaches its highest point. c. At the highest point, is the velocity zero? Explain. Yes, at the highest point the ball is not moving. Its velocity passes through zero as it changes direction. d. At the highest point, is the acceleration zero? Explain. No, for the acceleration to be zero there must be a zero net force on the ball. The force of the earth is always pulling the ball down. One can also say that the velocity is always changing on the ball's trip, therefore it is always accelerating. A look at the graph above shows that when the velocity is zero, the slope of the graph (acceleration) is not zero. e. At the highest point, is th [Show More]
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