Ch-07 Motion

What is uniform circular motion?

• Motion of an object in a circular path at a constant speed.

• Motion of an object in a straight line at a constant speed.

• Motion of an object in a zigzag path at a varying speed.

• Motion of an object in a spiral path at a constant speed.

Explain the concept of centripetal acceleration.

• Centripetal acceleration is the acceleration directed perpendicular to the circular path.

• Centripetal acceleration is the acceleration directed away from the center of a circular path.

• Centripetal acceleration is the acceleration directed parallel to the circular path.

• Centripetal acceleration is the acceleration directed towards the center of a circular path.

How does the speed of an object change in uniform circular motion?

• Speed decreases as the object moves in a circle

• Speed remains constant, but the direction of velocity changes continuously.

• Speed increases linearly with time

• Speed oscillates periodically

What is the difference between speed and velocity in circular motion?

• Velocity is the magnitude of the speed vector in circular motion

• In circular motion, speed is the magnitude of the velocity vector, but velocity also includes the direction of motion which changes constantly.

• Speed is the direction of motion in circular motion

• Speed and velocity are the same in circular motion

Describe the graphical representation of uniform circular motion.

• The graphical representation of uniform circular motion is a straight line.

• The graphical representation of uniform circular motion is a triangle.

• The graphical representation of uniform circular motion is a square.

• The graphical representation of uniform circular motion is a circle.

How can you determine the acceleration from a velocity-time graph?

• Divide the y-intercept by the x-intercept.

• Find the slope of the velocity-time graph.

• Count the number of peaks in the graph.

• Calculate the area under the graph.

What does a horizontal line on a distance-time graph represent?

• Object is at rest

• Object is in motion

• Object is accelerating

• Object is stationary

Explain the significance of the slope of a velocity-time graph.

• The slope shows the temperature of the environment.

• The slope represents the distance traveled by the object.

• The slope of a velocity-time graph represents the acceleration of an object.

• The slope indicates the mass of the object.

How can you calculate the displacement from a velocity-time graph?

• Calculate the area under the velocity-time curve to find the displacement.

• Subtract the acceleration from the velocity.

• Divide the final velocity by the initial velocity.

• Multiply the time by the acceleration.

Discuss the relationship between acceleration and the shape of a velocity-time graph.

• Acceleration is inversely proportional to the area under the velocity-time graph.

• Acceleration is directly related to the x-axis of the velocity-time graph.

• Acceleration is related to the slope of the velocity-time graph.

• The shape of the velocity-time graph has no impact on acceleration.