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| The following table shows information about three different objects sitting on a bookshelf. Some data are missing from the table. If object 2 has a height of 3 m, what is its gravitational potential energy?[image] |
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| The motion of a fish swimming in a fish tank is an example of which type of energy? |
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| A child pushes a toy car down a hill. After 5 seconds, the car has a kinetic energy of 115 J and a gravitational potential energy of 30 J. What is the car’s mechanical energy at that time? |
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The dotted lines in the following picture show orbital paths of objects. Which object orbits object E?
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| Melanie watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher, as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown? |
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| What is the difference between charging by conduction and charging by induction? |
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| During conduction, charges move between touching objects; during induction, charges are redistributed within an object that is near another object. |
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| During a lightning storm, the bottom of a cloud gains a strong negative electric charge. If you were to measure the charge at the top of a tall metal pole directly under the cloud, what would you expect to observe? |
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| The top of the pole would have a positive charge. |
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| A science lab has copper wire coated with rubber tubing, a plastic vial, and a pair of cotton gloves. Which of these materials is not an electrical insulator? |
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| When particles from the Sun travel towards the Earth, the Earth’s magnetic field pulls them towards the poles. These solar particles interact with particles in Earth’s atmosphere and can create a beautiful light display in the sky. What is this light display commonly called? |
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| Which of the following is a ferromagnetic material? |
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The following instrument measures, detects, and determines the direction of a small electric current. A student operating this instrument claims that this instrument has properties similar to an electromagnet. Which of the following statements would best defend this claim?
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| When electric charges flow through the wires, they produce a magnetic field around the wire. |
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| Which best describes electromagnetism? |
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| the interaction between electrical energy and magnetism |
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| Why is the magnetic force considered to be an action-at-a-distance force? |
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| Magnets do not have to touch each other to experience a force. |
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| A moving object collides with a stationary object. Which of the following statements is true according to Newton’s third law of motion? |
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| Each object exerts a force on the other, and the two forces are equal and in opposite directions. |
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