Question

Question 1 A)Which is the equation for an object’s kinetic energy?(1 point) Responses KE=12mv2 Upper K Upper E equals Start Fraction 1 over 2 End Fraction m v squared KE=12m2v Upper K Upper E equals Start Fraction 1 over 2 End Fraction m squared v KE=2mv2 Upper K Upper E equals 2 m v squared KE=2m2v Upper K Upper E equals 2 m squared v Question 2 A)A comet speeds up as it approaches the Sun. Which statement about its kinetic energy is correct?(1 point) Responses The comet’s kinetic energy decreases. The comet’s kinetic energy decreases. The comet’s kinetic energy stays the same. The comet’s kinetic energy stays the same. The comet has no kinetic energy because it is in outer space. The comet has no kinetic energy because it is in outer space. The comet’s kinetic energy increases. The comet’s kinetic energy increases. Question 3 A)A student rides her bicycle down a hill. Together, she and the bicycle have a mass of 56 kilograms. She is moving at 11 meters per second. What is her kinetic energy?(1 point) Responses 17,248 J 17,248 J 6,776 J 6,776 J 3,388 J 3,388 J 13,552 J 13,552 J Question 4 A)Mark is conducting an experiment to show how an object’s kinetic energy is affected by its mass and velocity. First, he lets an empty wagon roll down a hill and calculates its kinetic energy. Next, he repeats the experiment after placing a bag of sand in the wagon. Which is the best prediction for the second part of his experiment?(1 point) Responses The wagon will have less kinetic energy than when it was empty. The wagon will have less kinetic energy than when it was empty. The wagon will have the same amount of kinetic energy as when it was empty. The wagon will have the same amount of kinetic energy as when it was empty. The wagon will have less velocity than when it was empty. The wagon will have less velocity than when it was empty. The wagon will have more kinetic energy than when it was empty. The wagon will have more kinetic energy than when it was empty. Question 5 A)How could you use creative thinking to show the relationship between velocity and kinetic energy?(1 point) Responses Research a kinetic energy experiment online and follow the steps exactly when performing the experiment. Research a kinetic energy experiment online and follow the steps exactly when performing the experiment. Write down and perfectly follow your teacher’s instructions for performing the experiment. Write down and perfectly follow your teacher’s instructions for performing the experiment. Find two objects with the same mass and think of a way to demonstrate their kinetic energies at different velocities. Find two objects with the same mass and think of a way to demonstrate their kinetic energies at different velocities. Read about kinetic energy in your science textbook and highlight sentences in the book that seem important. Read about kinetic energy in your science textbook and highlight sentences in the book that seem important.

Answer 1

Here are the answers to your questions:

**Question 1: A)** Which is the equation for an object’s kinetic energy?
- **Response:** KE = (1/2)mv²

**Question 2: A)** A comet speeds up as it approaches the Sun. Which statement about its kinetic energy is correct?
- **Response:** The comet’s kinetic energy increases.

**Question 3: A)** A student rides her bicycle down a hill. Together, she and the bicycle have a mass of 56 kilograms. She is moving at 11 meters per second. What is her kinetic energy?
- **Response:** KE = (1/2)mv² = (1/2)(56 kg)(11 m/s)² = (1/2)(56)(121) = 3,388 J.
- Answer: **3,388 J**

**Question 4: A)** Mark is conducting an experiment to show how an object’s kinetic energy is affected by its mass and velocity. First, he lets an empty wagon roll down a hill and calculates its kinetic energy. Next, he repeats the experiment after placing a bag of sand in the wagon. Which is the best prediction for the second part of his experiment?
- **Response:** The wagon will have more kinetic energy than when it was empty.

**Question 5: A)** How could you use creative thinking to show the relationship between velocity and kinetic energy?
- **Response:** Find two objects with the same mass and think of a way to demonstrate their kinetic energies at different velocities.

These answers summarize the correct responses based on the principles of physics, specifically related to kinetic energy.