Understanding Velocity-Time Graphs and Newton's Laws

What does a straight diagonal line going up from left to right on a velocity-time graph represent?

• Constant deceleration

• Variable acceleration

• Constant acceleration

• Constant velocity

How is acceleration calculated for a section of a velocity-time graph?

• By finding the slope of the line

• By measuring the area under the line

• By dividing the change in velocity by the change in time

• By adding initial and final velocities

What is the acceleration for a section of the graph where the initial velocity is 2 m/s, final velocity is 0 m/s, and time is 3 seconds?

• 0 m/s²

• 0.67 m/s²

• 2 m/s²

• 1 m/s²

How do you find the displacement from a velocity-time graph?

• By calculating the slope of the graph

• By measuring the height of the graph

• By counting the number of lines on the graph

• By finding the area under the graph

What is the average velocity if the total displacement is 13 m and the total time is 9 seconds?

• 1.44 m/s

• 1.33 m/s

• 1.5 m/s

• 1.2 m/s

If the area under the first 2 seconds of a velocity-time graph increases, what happens to the displacement?

• It increases

• It remains the same

• It decreases

• It becomes zero

What does a decreasing acceleration in the first 2 seconds of a velocity-time graph indicate?

• The line is getting steeper

• The line is getting less steep

• The line is horizontal

• The line is vertical

According to Newton's second law, what must be true if a car is accelerating?

• The engine force is less

• The frictional force is greater

• The forces are unbalanced

• The forces are balanced

During constant velocity, what can be said about the forces acting on an object according to Newton's first law?

• The frictional force is greater

• The engine force is greater

• They are balanced

• They are unbalanced

What happens to the forces acting on a car when it decelerates according to Newton's second law?

• The forces are equal

• The frictional force is greater

• The forces are balanced

• The engine force is greater