PHY 200 Physical Science

Assignment 1.4 Chapter 2 and 3 Review

Chapter 2

1. What area of physics involves the study of objects moving at relatively low speeds?

1. How are length and time used to describe motion?

1. A jogger jogs around a circular track with a diameter of 300 m in 10 min. What was the jogger's average speed in m/s? What is the magnitude of the jogger's average velocity?

1. A group of college students eager to get to Florida on spring break drove the 750-mi trip with only minimum stops. They computed their average speed for the trip to be 55.0 mi/h. How many hours did the trip take?

Chapter 3

1. Can an object be at rest if forces are being applied to it? Explain.

1. A horizontal force of 250 N is applied to a stationary wooden box in one direction, and a 600-N horizontal force is applied in the opposite direction. What additional force is needed for the box to remain stationary?

1. Determine the net force necessary to give an object with a mass of 4.0 kg an acceleration of 5.0m/s^2.

1. 4. A 1000-kg automobile is pulled by a horizontal towline with a net force of 950 N. What is the acceleration of the auto? (Neglect friction.)