Work book Laws of Motion p 91

Which vehicle has the greatest applied force?

• A. Motorcycle

• B. Car

• C. Truck

• D. SUV

Evidence of Earth's plate tectonic activity is most obvious after an earthquake. Which explanation best describes this plate movement?

• F. The force of gravity causes the floating plates to move up and down. The plate movement sometimes results in earthquakes.

• G. Earth's plates are moving fast. However, the force of friction slows their movement.

• H. Earth's plates place stress on one another. However, when an earthquake occurs, plate movement is due to unbalanced force on the plates.

• J. Earth's plates continually place stress on one another. However, the force is balanced during an earthquake.

Which activity would best demonstrate Newton's law of force and acceleration?

• A. Roll a tennis ball across smooth and rough surfaces. The tennis ball rolls farther on the smooth surface because there is less friction.

• B. Fasten your seat belt securely in a vehicle. Ask the driver to accelerate and then brake suddenly. Feel how your body would continue at the previous velocity if it were not restrained.

• C. Push a small student desk and then a large cafeteria table. The cafeteria table will require more force because of its greater mass.

• D. Roll two balls toward each other with the same speed on a smooth surface. When they hit each other, they move in opposite directions with equal force.

Which of the following examples would best complete a graphic organizer for Newton's third law of motion?

• F. An air freshener hanging from the rear-view mirror of a car hangs still while the car moves forward with constant acceleration.

• G. Two balls of different masses are rolled with the same force, resulting in the ball with the larger mass stopping faster than the ball with the smaller mass

• H. A carbon dioxide-fueled rocket launches upward into the air as carbon dioxide gas accelerates toward the ground below the rocket.

• All of the above

Which of Newton's three laws of motion applies to a moving golf club hitting a golf ball at rest upon a tee?

• A. Newton's first law of motion, law of inertia, because both objects are in motion with the same speed moving in the same direction.

• B. Newton's third law of motion, law of action-reaction, because both objects are in motion with different speeds moving in the same direction.

• C. Newton's second law of motion, law of force and acceleration c. because both objects experience forces unequal in magnitude moving in opposite directions.

• D. Newton's third law of motion, law of action-reaction, because both objects experience forces equal in magnitude moving in opposite directions