Forces and Motion

What question were the students most likely trying to answer in their investigation with toy cars, where they applied a force and measured the time to move through a 10-meter distance?

Which of the following best explains the motion of the car represented by section "D" of the graph?

• The car is going faster than it was in section "B"
• The car is stopped in section "D"
• The car is moving on level ground in section "D"
• The car is higher than it was in section "B"

Which car won the race?

What would most likely happen to the motion of the box if you poured oil on the ramp?

What will magnet 'B' do if it is free to move?

What was the student most likely trying to model with the model car? Options:

The speed of a car

The forces acting on a car

The distance a car might move

The things that change the size of the car

If an unbalanced force acts on an object at rest, the object will move in the direction of the force. Which of the following best models an object with unbalanced forces acting on it?

What should be used as the independent variable to determine the effect of changing the mass of an object when an unbalanced force is applied? Options: Time, Force, Mass, Speed

How should a student graph data to show how changing the mass of an object affects stopping distance?

A group of students want to test the effect of balanced forces on the motion of objects with different masses. They conducted trials with 10-gram, 20-gram, and 30-gram blocks. They applied 100 Newtons of force to each side of the blocks as shown in each trial. Which hypothesis will most likely be supported by the results of the investigation? Options: When a balanced force is applied the block with the greatest mass will move fastest. When an unbalanced force is applied the block with the least mass will move fastest. When a balanced force is applied the speed of an object will not change. When an unbalanced force is applied the speed of an object will not change.