ba. SCIENCE 8 1 Quarter DIAGNOSTIC TEST Multiple Cholce. Choose the lefter of the correct answer and write it on the space provide before the number. velocity of 40m/s in 10 s. C 2. what is the acceleration of a ball with a mass of 6.0 RS is hit kaith a force of 16N2 A. 0.4 m/s2 C, 400 m/s2 B. 40 m/s2 D. 4000 m/s2 What is the external net force exerted on a 3.5 kg papaya, which is being pushed across a table and has an acceleration of 2.2 m/s2 to the left? A. Z.ON to the left C. 7.ZN to the left D.7.7N to the right . what is the mass of a crate with a net force of 300N and accelerate it by 0.750 m/s22 D. 400 kg C 5. A book is at rest on top of a table, which of the following is correcta A. There is no force acting on the book. C. There is no force acting on the table. do B. The book has no inertia. D. The book is in equilibrium 6. Which of the following situations involves friction? A. A bicycle rolling down a hill C. A diver falling through the air to a pool B. A baseball player sliding into 2nd base D. All of the above experience some friction. __7. What is gravity? A. Newton's first law B. The force that objects exert on each other because of their masses C. The downward pull on the Earth D. The friction that an object has put on it 8. Which is the best example of gravity? A. A car hits a tree, and its motion stops C. A book is pushed, and it moves across the table B. A breeze blows, and a sailboat moves D. A person drops a ball, and it falls to the ground 9. How does Earth 's gravity affect objects near Earth? A. It pushes them away. C. It makes them larger. B. It pulls them in D. It makes them move faster 10. refers to when a force is equal and opposite. A. balanced force B. unbalanced force C. magnitude D. friction 11.When one force in a pair is greater than the other, we call this: A. balanced force B. unbalanced force C. magnitude D. friction 12. If two forces are acting on an object they are equal in magnitude A. and equal in direction C. cancel each other B. and in opposite direction D. none of the above For question no 13 and 14 refer to the diagram below Two tugboats are moving a barge. Tugboat A exerts a force of 3000 N to the left. Tugboat B exerts a force of 5000N in the same direction. a. Draw arrows showing the individual forces of the tugboats in #1. b. Are the forces balanced or unbalanced? 13. c. In what direction will the barge move? 14. 15. What is the mass of a truck if it produces a force of 14,000N while accelerating at a rate of 5 m/s2 ? A. 280 kg C. 70,000kg B. 2800kg D. 7000kg​