Period 2 Question 1

Two cars accelerate from zero initial velocity and travel the same time. Acceleration of the Car #1 is twice smaller than acceleration of the car 2. The displacement from the original position for car # 2 as compared to the displacement for the car #1 is: a) The same b) Twice larger c) Twice smaller d) Four times larger e) Four times smaller

Period 2 Question 2

The net force acting on an object is equal zero The net force acting on an object is equal zero. Select a correct answer: a) The object can only be at rest b) It can either be at rest or move with constant velocity c) It will move with a constant acceleration d) None of the above

Period 3 Question 1

c) Both trips take the same time A boat moves through the water in a river at a speed of 8m/s relative to the water. The boat makes a trip downstream and then makes a trip upstream to the original starting point. Which trip takes longer? a) The downstream trip b) The upstream trip c) Both trips take the same time d) The answer cannot be figured without knowing the speed of the river flow

Period 3 Question 2

The earth exerts a gravitational force on a raindrop, pulling it down The earth exerts a gravitational force on a raindrop, pulling it down. Does the raindrop exert a gravitational force on the earth? a) No, it does not, since the earth is not moving towards the drop b) Yes, but the drop attracts the earth with much smaller force than the earth attracts the drop c) Yes, and the force acting on the earth is equal in magnitude to the force acting on the drop d) The raindrop will exert a force on the earth only at the moment when it touches the earth surface