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1. A person produces the least friction moving across which of these surfaces?

1. A person produces the least friction moving across which of these surfaces?. Carpet Ice Sand Wood floor. 2. Which two factors affect the gravitational attraction between two objects?. Density and friction Density and distance Mass and friction Mass and distance.

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1. A person produces the least friction moving across which of these surfaces?

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  1. 1. A person produces the least friction moving across which of these surfaces? • Carpet • Ice • Sand • Wood floor

  2. 2. Which two factors affect the gravitational attraction between two objects? • Density and friction • Density and distance • Mass and friction • Mass and distance

  3. 3. What happens to the force of gravity between two objects if the distances between them increases? • The pull of gravity increases. • The pull of gravity decreases. • The pull of gravity stays the same. • The pull of gravity disappears.

  4. 4. An object accelerates if its • Speed remains constant. • Direction changes. • Mass remains constant. • Motion can be plotted on a graph.

  5. 5. What happens to the motion of an object when the forces are balanced? • The motion changes. • The motion does not change. • The motion speeds up. • The motion slows down.

  6. 6. What happens to an object if the forces acting upon it are unbalanced? • Its motion will not change. • The object will come to a stop. • The net force will be zero. • Its motion will change.

  7. 7. Which pair of objects has the least gravitational attraction to each other? • Two cinder blocks 6 centimeters apart. • Two marbles 12 centimeters apart • A cinder block and a marble 6 centimeters apart • A cinder block and marble 12 centimeters apart.

  8. 8. Sandra rides a train a distance of 150 kilometers. The entire trip takes a total of 3 hours. What is the average speed of the train? • 450 km/h • 150 km/h • 75 km/h • 50 km/h

  9. 9. Which of the following is NOT needed to determine the velocity of a moving truck? • The mass of the truck • The distance it travels • The time it takes to travel that distance • The direction in which it is traveling

  10. 10. Two objects travelling at the same speed have different velocities if they • start at different times. • travel different distances. • have different masses. • move in different directions.

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