Force and Motion Test 2018
Quiz by Cheryl McLawhorn
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23 questions
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- Q1Newton's first law states that an object in motion will stay in motion unless acted upon by an unbalanced force. If you roll a ball across the floor, you put the ball in motion, but after time, the ball stops. Does this violate Newton's first law?Yes, because the unbalanced force of friction should have kept the ball movingNo, because the ball is acted upon by the unbalanced force of friction.Yes, because the ball should have continued rolling forever.No, because Newton's laws are really only theories.120s
- Q2Leah watches a toy car move across a table at a constant speed. The car moves across the table in one direction and falls off the other side. Leah decides to try another situation. She watches the car move across the table at a constant speed, then when it reaches the other side of the table, her friend Joey pushes the car in the other direction. The car moves back to Leah. Based on Leah's informal experiment, what forces cause the car to change direction?unbalanced forces from Leah watching the carbalanced forces from Joey pushing the carbalanced forces from the car moving across the tableunbalanced forces from Joey pushing the car120s
- Q3Randy is sledding down a hill away from his sister, Leslie, who is standing at the top of the hill. At first, Randy moves at a constant speed down a nearly flat part of the hill. Then, suddenly, the hill becomes much steeper, and Randy almost immediately starts moving at a much faster speed. Which graph shows Randy's position as he moves away from his sister?YZXW120s
- Q4The motion of an object is described by the graph below. The object is moving at a _______ speed, and the forces acting on it are _______.constant; balancedconstant; unbalancechanging; balancedchanging; unbalanced120s
- Q5A ball is dropped from a tower. From whose reference point is the ball approaching the observer?a person on the ground driving rapidly away from the towera person in an airplane flying above the towera person standing on top of the towera person standing on the ground beneath the tower120s
- Q6Sandy puts a paper clip on the table and puts a magnet near the paper clip. The paper clip begins to move. What type of forces are acting on the paper clip?balancedonly magneticonly gravitationalunbalanced120s
- Q7Dons car broke down. He is pushing it home. He is pushing it with a force of 45 N, and the force of friction is pushing in the opposite direction in 45 N. If the car is moving at a constant speed of 2.5 meters per second , which graph show the distance traveled through timeDBCA120s
- Q8_______ can be generally defined as a change in position.ForceSpeedMassMotion120s
- Q9A book is sitting on a table at rest. Which of the following best describes the forces acting on the book?The forces on the book are balanced because the gravity pulling down on the book is equal to the upward force applied by the table.The forces on the book are unbalanced because the gravity pushing down on the book is not equal to the force of the table pushing up on the book.The forces on the book are balanced forces because the gravity pushing up on the book is equal to the friction from the table pushing the book to the right.The forces on the book are unbalanced because the gravity pushing up on the book is not equal to the friction from the table pushing the book to the right.120s
- Q10Steve and Barry are racing each other, and Barry is winning. If Barry is moving faster than Steve, from which reference point is Barry's position increasing through time?Steve's reference pointan observer in front of Steve and BarryBarry's reference pointthe finish line120s
- Q11Gravity should make the rock slide down the hill. What force is acting to balance gravity, keeping the rock in place?gravitymomentumfrictioncentripetal force120s
- Q12An object has balanced forces acting on it. Which of the following describes the result these balanced forces have on the object?It remains at rest or moves at constant speed in the same direction.It speeds up in the same direction or moves at constant speed.It speeds up in the same direction or slows down.It remains at rest or speeds up in the same direction.120s
- Q13A train is speeding down a railroad track at a speed of 50 miles per hour. From whose reference point is the train not moving?a person sitting on the tracks 1 mile behind the traina person sitting on the traina person sitting on the tracks 1 mile in front of the traina person standing to the side of the railroad tracks120s
- Q14Bryan and Alyssa are playing tug-of-war against Daniel and Maria. Bryan and Alyssa are exerting a combined force of 10 N. Daniel and Maria are exerting 12 N of force. Which of the following has resulted?a balanced force leaving everyone in the same placean unbalanced force moving everyone in Bryan and Alyssa's directiona balanced force moving everyone in Daniel and Maria's directionan unbalanced force moving everyone in Daniel and Maria's direction120s
- Q15Last-minute Louis frantically tried to finish his homework while his mom drove him to school. He placed his book on his lap and was reaching for a pencil when his mom suddenly slammed on the brakes. Although Louis stayed buckled in his seat, his book flew forward and crashed into the front windshield. Which of the following was most responsible for the book flying forward?displacementgravityinertiafriction120s
