78 Force, Acceleration, and Mass

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78 Force, Acceleration, and Mass

Key Vocabulary

• acceleration• force• mass• m/s2

• Newton (N)

78 Force, Acceleration, and Mass

What is acceleration?

What are the metric units for speed, acceleration, and force?

Record your answer in your notebook.

78 Force, Acceleration, and Mass

Calculate

If a car traveling at 8 m/s to the right takes 2 seconds to speed up to 12 m/s in the same direction, what is its acceleration?

Share your answer with the class.

78 Force, Acceleration, and Mass

Read the introduction and look for key ideas

How does the car’s acceleration and mass affect the force it applies to an object it may hit?

78 Force, Acceleration, and Mass

What is the mathematical relationship between force, acceleration, and mass?

How does the acceleration of the dogs affect the force on the sled?

78 Force, Acceleration, and Mass

Read the procedure step 1

What are the similarities and differences between this experiment and the ones you did earlier?

Share your thoughts with the class.

78 Force, Acceleration, and Mass

Complete procedure part A: Graphing the Variables

78 Force, Acceleration, and Mass

Analysis question 1

Look at your graphed line for Experiment 1. Explain why it does or does not indicate that there is a relationship between force and acceleration.

78 Force, Acceleration, and Mass

Complete procedure parts B and C

78 Force, Acceleration, and Mass

Analysis question 2

Compare the two lines, “Experiment 1” and “Experiment 2” on your graph. Identify and explain:

a. any similarities.

b. any differences.

78 Force, Acceleration, and Mass

Analysis question 3

In your science notebook, make a table like the one below. Use your equation for force, mass, and acceleration to find the missing values.

78 Force, Acceleration, and Mass

Analysis question 4

In the first activity, Vehicle 2 has a greater acceleration than Vehicle 1, but has a less forceful engine. How can this be? Explain in terms of your equation.

78 Force, Acceleration, and Mass

Analysis question 5

One newton of force is the same as 1 kg m/s2. Explain how this unit of measurement is appropriate for your equation.

78 Force, Acceleration, and Mass

What is the mathematical relationship between force, acceleration, and mass?

How will the force of the golf club affect the acceleration of the golf ball?

78 Force, Acceleration, and Mass

Key vocabulary definitions

Acceleration - The rate at which an object changes speed and/or direction.

Force - A push or pull.

Mass – The amount of matter in an object or system.

78 Force, Acceleration, and Mass

Key vocabulary definitions

m/s2 - Unit used to express acceleration; meters per second per second.

Newton (N) - The (SI) unit for force; 1 kg x 1 m/s2.