physics chapter 1 and 2 conceptual and multiple choice questions?

Question

I have a final exam on Tuesday and I am doing conceptual and multiple choice questions to prepare myself. These are a few I need help on from Chapter 1 and 2:

1.) the price of gasoline at a particular station is 1.5 euros per liter. An american student can use 33 euros to buy gasoline. Knowing that 4 quarts make a gallon and that 1 liter is close to 1 quarter, she quickly reasons that she can buy how many gallons of gasoline?

2) An object with a mass of 1 kg weighs approximately 2 lbs. Use this info to estimate the mass of the following objects: a. baseball, b. textbook, and c. pickup truck

3.) a ball rolls in a straight line along the horizontal direction. describe the velocity and acceleration of the ball for each of the following situations: a.) ball moves to the right at a constant speed, b.) ball moves from right to left and continually slows down. c.) ball moves from right to left and continually speeds up, and d.) ball moves to the right, first speeding up at a constant rate and then slowing down at a constant rate

? · Accepted Answer

1.) (1 liter/1.5 euros) x (33 euros) x (1 gallon/4 liters) = 5.5 gallons

2.) (1kg/2 lbs) x "the weight of the object" = "estimate of mass of the object"
        this answer only applies where 1kg mass produces a 2 lb force. For example the force on a 1 kg mass would be different on the moon than it is on earth.

3.)  a.) the velocity is a vector to the right, the acceleration is 0
      b.) the velocity is a changing(decreasing) vector to the left, the acceleration is a constant vector to the right

same idea for c & d

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physics chapter 1 and 2 conceptual and multiple choice questions?

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