2015 Spring- Statics (001)Name and Section:

Date:

Homework 1

Chapter 1

Your first homework assignment is to:

1. Come by my office during office hours (or email me for an appointment) by January 28th, 2015.

2. Complete the questions below.

Chapter 1 Questions

1. Solve book problem 1-9.

OR:

2. What is mass? A measure of a quantity of matter that is used to compare the action of once body

with that of another. This property manifests itself as a gravitational attraction between two

bodies and provides a measure of the resistance of matter to a change in velocity.

3. What is the name of the FORCE exerted on an object at sea level? Weight

4. How does mass differ from weight? Mass is an intrinsic property while weight changes with

changling location as a function of the acceleration due to gravity.

5. Your mass on Earth is the same/different than your mass on Mars. Why? Different because the

acceleration due to gravity is different.

6. Give me one real life example (everyday object) obeying Newton’s1st law: The coffee cup sitting

on my desk will continue to sit there until acted upon by a force.

7. Give me one real life example (something you see or do every day) that obeys Newton’s 2nd law:

A car impacting a wall has a force equal to the acceleration of the car in the forward direction

times the mass. The car also exerts a force called weight equal to the acceleration due to gravity

times the mass of the car.

8. Newton’s law of gravitational attraction applies to: (choose one or more)a. The force between the moon and the earthb. The force between you and a person or object near youc. The force between any two objects. However only the force between the earth and

objects on it are large enough to be quantified.

9. Write both the full version of Newton’s law of gravitational attraction and the simplified version that applies to objects on Earth at sea level.

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F=G m 1m2r2

10. According to SOHCAHTOA,

Sine = opposite/hypotenuse

Cosine = adjacent/hypotenuse

Tangent = opposite/adjacent

Important points

WEIGHT IS A FORCEKnow Newton’s 3 LawsKnow base units, derived units, the unit for force, mass, distance and time and how to convert units

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