Forces and Motion

Front

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?

Back

Does the force on a car affect the change in motion?

Front

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"

Back

The car is stopped in section "D"

Front

Which car won the race?

Back

Car 1

Front

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

Back

It will speed up the box because the force of friction will be reduced.

Front

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

Back

The magnetic force will pull it to the left.

Front

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

Back

The forces acting on a car

Front

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?

Back

Front

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

Back

Mass

Front

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

Back

He should make a line graph with mass on the "X" axis and distance on the "Y" axis.

Front

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.

Back

When a balanced force is applied the speed of an object will not change.