SSA Quiz #6: Forces and Changes in Motion

[6.P.12.1] The graph below plots the distance in kilometers traveled by an object over time in hours.

What can you conclude from this graph?

• The speed of the moving object constantly changes.

• The speed of the moving object increases over time.

• The speed of the moving object decreases over time.

• The speed of the moving object remains constant.

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[6.P.12.1] The speed of the moving object remains constant. Which statement about the skier is correct?

• The skier’s kinetic energy is higher at point A than at point B.

• The skier’s kinetic energy is lower at point C than at point B.

• The skier’s potential energy is lower at point A than at point C.

• The skier’s potential energy is higher at point B than at point C.

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[6.P.13.2] All matter has mass, and gravity is a result of mass. Which statement about mass is correct?

• Mass of an object remains constant regardless of its location.

• Mass depends on the gravitational force acting on it.

• Mass is expressed in a unit known as the Newton (N).

• Mass is a measure of the gravitational force exerted on an object.

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[6.P.13.1] Wet floors can sometimes be slippery. What is the reason for this?

• The water increases the friction between the floor and feet.

• The water decreases the friction between the floor and feet.

• The water produces a new force between the floor and feet.

• The water sets up a magnetic force between the floor and feet.

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[6.P.12.1] Kalinda did an experiment to study motion. She measured an object moving 20 meters (m) after 2 seconds (s), and she plotted her first data point as shown on the graph below. She also discovered that the object moved at a constant speed.

Which of the following data points should Kalinda correctly plot next on her graph?

• 40 meters, 3 seconds

• 30 meters, 5 seconds

• 40 meters, 4 seconds

• 50 meters, 6 seconds

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[6.P.13.2] Gravitational force between objects depends on mass and distance.  Venus and Earth have about the same mass. However, the gravitational force between Venus and the Sun is stronger than the gravitational force between Earth and the Sun. What is the reason for this difference?

• Earth is closer to the Sun

• Venus is closer to the Sun

• Venus and Earth are far apart

• Venus and Earth are close together

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[6.P.13.1] Hector wrapped a copper wire around a nail and attached the ends of the wire to a battery. What force was responsible for causing the paper clips to attach themselves to the nail?

• magnetic force

• balanced force

• frictional force

• gravitational force

[6.P.13.1] Luis rubbed a balloon on his hair and held the balloon next to the wall. He observed the balloon stick to the wall. Which of the following is responsible for the balloon sticking to the wall?

• Gravity

• Friction

• Magnetic force

• Electrical Force

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[6.P.13.1] Forces that act at a distance include electrical force and gravitational force. What other type of force acts at a distance?

• Friction

• Magnetic Force

• Contact Force

• Conduction

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[6.P.13.1] Bar magnets have a north pole (N) and a south pole (S). Latrisha places a bar magnet on three small straws so that it can roll. Her setup is shown below. Placing which of the following objects at point X will cause the bar magnet to move away from point X?

• Iron Nail

• Aluminum Can

• The north end of another bar magnet

• The south end of another bar magnet

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