1. A student pushes a box across a frictionless floor. On the first try, the box accelerates too slowly. To achieve a greater change in velocity in the same amount of time, what single change should the student make?
- A. Push with less force.
- B. Add mass to the box.
- C. Push with more force.
- D. Apply the force for a shorter period of time.
2. If you were to create a graph showing the relationship described, with the resulting change in velocity on the y-axis and the strength of the force on the x-axis (for an object of constant mass), what would the graph look like?
- A. A curved line that starts high and then levels off as the force increases.
- B. A straight line with a positive slope that passes through the origin.
- C. A horizontal line indicating that velocity change is independent of the force applied.
- D. A U-shaped curve that shows the change is minimized at a medium force.
3. Which statement best describes the relationship between the strength of a net force applied to an object and its motion, assuming the object's mass does not change?
- A. The change in the object's velocity is inversely proportional to the applied force.
- B. A stronger force results in a proportionally greater change in the object's velocity.
- C. The object's final velocity is always equal to the strength of the force applied.
- D. Any applied force will cause the object to move at a constant velocity.
4. A rocket thruster applies a force of 100 newtons, causing a satellite's speed to increase by 5 m/s. If the engineers instead used a thruster that applied a force of 300 newtons, what would be the expected increase in the satellite's speed, assuming its mass remains constant?
- A. 5 m/s
- B. 10 m/s
- C. 15 m/s
- D. 50 m/s
5. An engineer is programming a space pod to dock with a space station. The pod needs to decrease its speed by a precise amount to avoid a collision. Why is understanding the direct relationship between force and change in velocity critical for this task?
- A. It allows the engineer to maximize the pod's speed right before the docking procedure begins.
- B. It helps determine the exact strength of the thruster burst needed to achieve the required change in velocity for a safe connection.
- C. It ensures the pod's mass remains entirely constant throughout the entire docking procedure.
- D. It is the primary principle used to calculate the gravitational force between the pod and the larger space station.
6. A rocket requires a powerful thrust for takeoff, while a gentle breeze barely moves a car. This comparison illustrates that the magnitude of a force determines the:
- A. object's weight.
- B. object's initial position.
- C. scale of the change in the object's velocity.
- D. direction the object was traveling before the force was applied.
7. A student gently taps a soccer ball with their foot. Why does the ball only roll a short distance?
- A. The force of the tap had a very low magnitude.
- B. The ball is too heavy to be moved effectively.
- C. The force was applied in the wrong direction.
- D. Any force applied to a round object is immediately cancelled out.
8. Two identical boxes are at rest. Box A is pushed with a force of 10 newtons, and Box B is pushed with a force of 5 newtons. Which statement is correct?
- A. The force on Box B has a greater magnitude.
- B. The force on Box A has a greater magnitude.
- C. Both forces have an identical magnitude.
- D. Neither push represents a force with magnitude.
9. Which of the following scenarios best demonstrates a low-magnitude force producing a negligible change in velocity?
- A. A cannon firing a cannonball across a field.
- B. A car crashing into a wall and coming to a sudden stop.
- C. A person trying to push a skyscraper with their hands.
- D. An engine propelling a speedboat across a lake at high speed.
10. If the magnitude of the force pushing a cart is doubled, what happens to the cart's change in velocity, assuming its mass stays the same?
- A. Its rate of changing velocity increases.
- B. It stops moving.
- C. It continues moving without any change in its speed or direction.
- D. It reverses course and travels in the opposite direction.