Unit 3 Review

If the ball was in motion on the hall, how would the ball be affected if the force from both side is equal?

• The ball would maintain constant motion.

• The ball would come to a complete stop.

• The ball would increase in speed.

• The car would decrease in speed.

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Martin hit a high fly ball, Because the ball was also being acted on by the force due to gravity, the ball will?

• Travel at the same speed until it hits the ground

• Speed up as it goes off the bat keep its same direction and then slow down as it falls to the ground.

• The ball would not make it to the second base?

• Travel in the same direction until it hits the ground

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What is the average speed on the line that is in this picture?

• 100 m/s

• 20 m/s

• 10 m/s

• 4 m/s

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If the ball rolls down the inclined plane ( letter a) in the direction of the arrow in 2.42 seconds with a distance of 5 meters, what is the average speed of the ball during the rolling?

• 1.24 m/s

• 1.65 m/s

• 2.07 m/s

• 4.96 m/s

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The graph shows the speed of a car. Which of the following was the average speed of the car in 80 sec?

• 10 m/s

• 30.5 m/s

• 40 m/s

• 13.75 m/s

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Ball rolling, student walking, car moving, falling rocks and roller skating are all examples of:

• atomic energy

• kinetic energy

• chemical energy

• potential energy

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Potential energy is?

• an object that is moving

• Energy from the sun

• Energy that is store in an object due to its position

• Dependent on its shape

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What type of energy does the ball have at each of this points A, C and E? If the ball leaves from point A, travels to its highest point C and is falling to the ground at point E

• A-potential, C-electrical, E-potential

• A-Kinetic, C-Electrical, E-Potential

• A-Kinetic, C-potential, E-kinetic

• A-potential, C- kinetic, E- potential

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The picture shows a blue box that needs to be push up an inclined plane. Which ramp should a person most likely choose?

• A shorter ramp, because it would increase the incline of the ramp and require less pushing force.

• A longer ramp, because it would decrease the incline of lthe ramp and require less pushing.

• A shorter ramp, because it would decrease the incline of th ramp and require less pushing.

• A longer ramp, because it would increase the incline of the ramp and require less pushing force.

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The graph shows the speed of a car. Which of the following was the average speed of the car in 80 sec?

• 10 m/s

• 30.5 m/s

• 40 m/s

• 13.75 m/s

Tags

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