What are the units of mass and the units of weight for the metric system?

What are the units of mass and the units of weight for the metric system?

What are the units of mass and the units of weight for the English system?

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1. Explain the relationship between the mass and the weight of an object. Is the mass of an object the same on earth and the moon? Are the weights the same on earth and the moon?

3. In your own words, explain Newton’s second law of motion and give two examples.

4. How does mass affect the rate of acceleration in free fall:

   1. 1. In air?

      2. In a vacuum?

5. If the mass of a sliding block is tripled while a constant net force is applied, by how much does the acceleration decrease?

6. Explain the difference between a vector and a scalar quantity. Give at least two examples of different variables that are vector and scalar quantities.

7. Give an example of Newton’s third law of motion and explain why it is an example.

8. For each of the following interactions, identify the action and reaction forces:

   1. 1. A hammer hits a nail.

      2. Earth’s gravity pulls down on a book.

      3. A helicopter blade pushes air downward.

9. Answer the following questions:

   1. 1. If you stand next to a wall on a frictionless skateboard and push the wall with a force of 30 Newtons, how hard does the wall push on you?

      2. If your mass is 60 kilograms, what is your acceleration?