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Motion & Forces

Motion & Forces. Mrs. Laubscher. The overall force on an object after all the forces are added together is called the ____________________ force. Inertia Unbalanced Gravitational Net . Which one of the following cannot be true for a car that is accelerating? .

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Motion & Forces

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  1. Motion & Forces Mrs. Laubscher

  2. The overall force on an object after all the forces are added together is called the ____________________ force. • Inertia • Unbalanced • Gravitational • Net

  3. Which one of the following cannot be true for a car that is accelerating? • It is moving with increasing speed • It is moving with a faster speed than it was before • It has a high constant velocity • It is changing direction

  4. As an object falls freely, its • Speed increases • Acceleration increases • Both increase • None of these

  5. The gravitational pull is greater between two objects that • Have rougher surfaces • Are farther apart • Have greater masses • Are moving at a greater speed.

  6. Mass is . . . • Different on the moon than on Earth • A measure of gravitational force • Measured in newtons • A measure of the amount of matter

  7. When a mover puts furniture on a dolly with wheels, which type of friction is the mover using to make his job easier? • Rolling friction • Static friction • Sliding friction • Fluid friction

  8. The average speed of a horse which gallops 10 kilometers in 30 minutes is • 3 km/hr • 6 km/hr • 10 km/hr • 20 km/hr

  9. Ten seconds after starting from rest a free falling object will have a speed of about . . . • 10 m/s • 50 m/s • 100 m/s • More than 150 m/s

  10. What is the net force an object will have when you combine a force of 14 N north with a force of 6 N south? • 8 N North • 20 N South • 20 N North • 8 N South

  11. Mars is less massive than Earth. If you could travel to mars which would be true? • Your mass would go down but your weight would stay the same. • Your weight would go down but your mass would stay the same. • Both your mass and weight would change. • Your weight would go up but your mass would stay the same.

  12. To stop the motion of a baseball, you must apply ___ to the ball • An unbalanced force • Inertia • A balanced force • A zero net force

  13. If A is a distance time graph, what is the car doing? • Going at a constant speed • Accelerating at a constant speed • Not moving • Decelerating

  14. If D is a velocity vs. time graph, what is the car doing? • Going at a constant speed • Gradually accelerating • Gradually decelerating • Going at a constant acceleration

  15. If E is a distance vs. time graph what is the car doing? • Going from far away to closer to home • Decelerating • Going backwards • Accelerating towards the start

  16. Which of the following moving at the same speed, would have the least momentum? • A spider • A frog • A cat • A bear

  17. If there is no friction, when two objects of the same mass collide and do not stick together the objects ____ velocities • Add • Subtract • Multiply • Divide • Average • Switch

  18. To increase acceleration of an object you can • Increase the force and increase the mass • Decrease the force and decrease the speed • Increase the force and increase the speed • Increase the force and decrease the mass

  19. Which of the following is untrue about inertia? • It’s also Newton’s first law • It is caused by applying an unbalanced non-zero net force. • It is a resistance to motion • It says that an object in motion tends to stay in motion at a constant velocity

  20. If Earth’s gravity disappeared, our moon would • Continue to orbit the Earth • Orbit the sun • Fly off in a straight line • Crash into Earth

  21. The force that causes an object to move in a circle is • Centripetal force • Centrifugal force • Terminal velocity • Free fall

  22. The formula for ____ is mass x velocity. • Acceleration • Momentum • Force • Speed

  23. When two objects collide and stick together, to find the velocity of both you need to consider all of the following except? • Law of conservation of momentum • The amount of mass of both objects added together • The total amount of momentum • The force of how hard the first object hit the second object

  24. The reason that a bowling ball can hit down more pins than a tennis ball is . . . • You can throw the tennis ball faster. • Newton’s First Law • Newton’s Second Law • Newton’s Third Law • The Law of Conservation of Momentum • Centripetal Force • The Law of Universal Gravitation

  25. When you paddle a canoe, the canoe goes forward because of . . . • Paddling creates a balanced force • Newton’s First Law • Newton’s Second Law • Newton’s Third Law • The Law of Conservation of Momentum • Centripetal Force • The Law of Universal Gravitation

  26. The reason why Earth orbits the sun is • Newton’s First Law • Newton’s Second Law • Newton’s Third Law • The Law of Conservation of Momentum • Centripetal Force • Earth has a lot of gravity

  27. The reasons why you need to wear a seatbelt is . . . • Law of Universal Gravitation • Newton’s First Law • F = m x a • F = m/a • Newton’s Third Law • Law of Conservation of Momentum • Elastic & inelastic collisions

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