McGraw-Hill OnlineMcGraw-Hill Higher EducationLearning Center
Student Center | Instructor Center | Information Center | Home
NetTutor
Exploring Physical Science
Interactive Periodic Table
Web Links
Message Board
Career Opportunities
Chapter Outline
Chapter Overview
Multiple Choice Quiz 1
Multiple Choice Quiz 2
True or False
Essay Quiz
Flash Cards
Exercises
Matching
Crossword Puzzles
Questions
Tutorial Tests
Animations
Feedback
Help Center


Physical Science, 5/e
Bill Tillery, Arizona State University
Patterns of Motion

Exercises

  1. What force is needed to give a 40.0 kg grocery cart an acceleration of 2.4 m/s2? Answer
  2. What is the resulting acceleration when an unbalanced force of 100 N is applied to a 5 kg object? Answer
  3. What force is needed to accelerate a 1,000 kg car from 72 to 108 km/hr over a time period of 5 s? Answer
  4. An unbalanced force of 18 N is needed to give an object an acceleration of 3 m/s2. What force is needed to give this very same object an acceleration of 10 m/s2? Answer
  5. A rocket pack with a thrust of 100 N accelerates a weightless astronaut at 0.5 m/s2 through free space. What is the mass of the astronaut and equipment? Answer
  6. A 1,500 kg car is to be pulled across level ground by a towline from another car. If the pulling car accelerates at 2 m/s2, what force (tension) must the towline support without breaking? Answer
  7. What is the gravitational force the Earth exerts on the Moon if the Earth has a mass of 5.98 x 1024 kg, the Moon has a mass of 7.36 x 1022 kg, and the Moon is on the average a center-to-center distance of 3.84 x 108 m from Earth? Answer
  8. What is the acceleration of gravity at an altitude of 500 kilometers above the earth's surface? Answer
  9. What would a student who weighs 591 N on the surface of the earth weigh at an altitude of 1,100 kilometers from the surface? Answer
  10. What is the momentum of a 100 kg football player who is moving at 6 m/s? Answer
  11. A car weighing 13,720 N is speeding down a highway with a velocity of 91 km/hr. What is the momentum of this car?
  12. Car A has a mass of 1,200 kg and is driving north at 25 m/s when it collides head-on with car B, which has a 2,200 kg mass and is moving at 15 m/s. If the collision is exactly head-on and the cars lock together, which way will the wreckage move? Answer
  13. A 15 g bullet is fired with a velocity of 200 m/s from a 6 kg rifle. What is the recoil velocity of the rifle? Answer
  14. An astronaut and equipment weigh 2,156 N on earth. Weightless in space, the astronaut throws away a 5.0 kg wrench with a velocity of 5.0 m/s. What is the resulting velocity of the astronaut in the opposite direction? Answer
  15. A student and her boat have a combined mass of 100.0 kg. Standing in the motionless boat in calm water, she tosses a 5.0 kg rock out the back of the boat with a velocity of 5.0 m/s. What will be the resulting speed of the boat? Answer
  16. (a) What is the weight of a 1.25 kg book?Answer (b) What is the acceleration when a net force of 10.0 N is applied to the book? Answer
  17. What net force is needed to accelerate a 1.25 kg book 5.00 m/s2? Answer
  18. What net force does the road exert on a 70.0 kg bicycle and rider to give them an acceleration of 2.0 m/s2? Answer
  19. A 1,500 kg car accelerates uniformly from 44.0 km/hr to 80.0 km/hr in 10.0 s. What was the net force exerted on the car? Answer
  20. A net force of 5,000.0 N accelerates a car from rest to 90.0 km/hr in 5.0 s. (a) What is the mass of the car?Answer (b) What is the weight of the car? Answer
  21. What is the weight of a 70.0 kg person? Answer
  22. A 1,000.0 kg car at rest experiences a net force of 1,000.0 N for 10.0 s. What is the final speed of the car? Answer
  23. What is the momentum of a 50 kg person walking at a speed of 2 m/s? Answer
  24. How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s? Answer
  25. What is the velocity of a 100.0 g ball on a 50.0 cm string moving in a horizontal circle that requires a centripetal force of 1.0 N? Answer
  26. A 1,000.0 kg car moves around a curve with a 20.0 m radius with a velocity of 10.0 m/s. (a) What centripetal force is required?Answer (b) What is the source of this force? Answer
  27. On earth, an astronaut and equipment weigh 1,960.0 N. While weightless in space, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronaut and equipment? Answer








Copyright2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.