Physics: Forces, Motion, and Graphs Assessment

In a distance-time graph, what does a line that curves upward with increasing steepness represent?

• An object slowing down
• An object with constant speed
• An object speeding up
• An object at rest

If a car travels at a constant velocity of 30 m/s for 5 seconds, what would its velocity-time graph look like?

• A horizontal line at 30 m/s
• A diagonal line going up
• A curved line
• A horizontal line at 0 m/s

Which of the following best explains why mass is a scalar quantity while weight is a vector?

• Mass has size but no direction, while weight acts in the direction of gravity
• Mass is always positive, while weight can be negative
• Mass is measured in kg, while weight is measured in N
• Mass changes with location, while weight stays constant

What physical principle explains why you slide forward in a car when it suddenly stops?

• Newton's First Law of Motion
• The law of gravity
• The principle of acceleration
• The concept of friction

How would you interpret a velocity-time graph that shows a straight line with a positive slope?

• The object has constant speed
• The object has constant acceleration
• The object is stationary
• The object has decreasing velocity

If a distance-time graph shows a horizontal line for 5 seconds, what can you conclude about the object's motion?

• It's moving at constant speed
• It's accelerating
• It's stationary
• It's decelerating

Which combination of changes might indicate that friction is acting on a moving object?

• Decreased speed and increased temperature
• Increased speed and decreased temperature
• Constant speed and constant temperature
• Increased speed and increased temperature

What does the area between a velocity-time graph and the time axis represent?

• Speed
• Acceleration
• Distance traveled
• Force applied

Why is velocity considered a vector while speed is a scalar?

• Velocity includes direction information while speed doesn't
• Velocity is always faster than speed
• Velocity is measured in different units than speed
• Velocity only applies to objects moving in straight lines

If an object's velocity-time graph shows a negative slope, what is happening to the object?

• It's moving faster
• It's slowing down
• It's moving at constant speed
• It's not moving at all