Tinora Science Fusion Unit 6

Velocity is a measurement related to motion. What is velocity?

• a force that considers the rate at which acceleration changes

• a force that opposes motion between two surfaces that are touching

• a measure of both the speed and direction of a moving object

• a measure of how fast something moves between two points

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Which describes friction?

• a unit that is a measure of speed

• a force that works against gravity

• a form of energy that depends on light and heat

• a force that opposes motion between two surfaces that are touching

The speed of which of the following objects is affected by gravity?

• a rock falling off a high cliff

• an airplane flying through the air

• a sailboat gliding across the water

• a marble rolling along the ground

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Astronauts design an experiment to test the effect of force on an object. They know that one of the forces we experience on Earth is less on the moon. Which force are the astronauts testing?

• Gravity

• acceleration

• Friction

• Velocity

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A bus driving on the road during the winter drives onto an icy spot and starts to slide. A decrease in which of the following forces causes the bus to slide?

• Thrust

• Acceleration

• Friction

• Gravity

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A car traveling down a road approaches a red light. The driver pushes the car’s brakes and the car slows to a stop. What causes the car’s speed to change?

• a decrease in velocity

• an increase in velocity

• a decrease in friction

• an increase in friction

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Mrs. Newton’s class designed an experiment to test the effect of force on an object. Four students rolled a tennis ball across floors with different surfaces. Three used smooth surfaces. One student used a rough surface. They measured how far the balls rolled. The table below shows the data they collected.

Analyze the data. Which student rolled a tennis ball across a rough surface?

• Alicia

• Alex

• Jorge

• Lucy

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Lukas designed an experiment to investigate forces and motion. The table shows the distances and times a ball rolled during his investigation. For each trial, the ball started from rest and a force caused it to move.

Analyze the data. During which trial did the greatest force cause the ball to move?

• Trail 1

• Trial 2

• Trail 3

• Trail 4

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Bodhi designed an experiment to study motion. He used the measured data he collected about the distance a toy car traveled over time to make this graph.

Analyze the pattern shown in the graph. What did Bodhi do to the car between points W and X?

• He slowed it down

• he made it accelerate

• He put it in a steep incline

• He stopped it from moving

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Carla designed an experiment to test velocity. She made the table below to analyze her data.

What important information is missing from Carla’s data table?

• the total distance the object traveled

• the direction the object traveled

• the total time taken to travel the distance

• the time taken to complete the experiment

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