Period 2Question 1

As a pendulum swings back and forth, the forces acting on the suspended object are: gravity, the tension in the support cord, and the air resistance. Which of these forces does no work on the object?Select the best answer

1. gravity

2. tension

3. Air resistance

4. All of these forces do some work

5. None of these forces does any work

Period 2Question 2

A Hooke’s law spring is compressed a distance d and is used to launch a mass m vertically to a height h above the starting point.Under double the compression (2d) the spring is now used to launch the mass. How high does the mass now rise above the starting point?

1. h2. 2 h3. 1.41 h4. 4 h

Period 3Question 1

As a pendulum swings back and forth, the forces acting on the suspended object are: gravity, the tension in the support cord, and the air resistance. Which of these forces does no work on the object?Select the best answer

1. Gravity

2. Air resistance

3. Tension

4. All of these forces do some work

5. None of these forces does any work

Period 3 Question 2

A Hooke’s law spring is compressed a distance d and is used to launch a mass m vertically to a height h above the starting point.The same spring is taken to the Moon where gravity is 6 times less than on Earth. How high does the mass now rise above the starting point on the Moon?

1. 2 h2. 2.4 h3. 3 h4. 6 h5. h/6