Motion in Grade 7

What is the difference between speed and velocity?

• Velocity is the magnitude of speed without direction

• Speed is always constant while velocity can change

• Speed and velocity are the same thing

• Speed is the magnitude of velocity without direction.

Explain the concept of acceleration and provide an example.

• Acceleration is when a car maintains a constant speed of 60 miles per hour.

• An example of acceleration is when a car slows down from 60 miles per hour to 0 in 10 seconds.

• Acceleration is when a car travels at a constant speed of 30 miles per hour.

• An example of acceleration is when a car increases its speed from 0 to 60 miles per hour in 10 seconds. The car experiences positive acceleration as it is speeding up.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

How can you graph the motion of an object?

• Draw a scatter plot with time on the x-axis and the acceleration of the object on the y-axis

• Use a bar graph with time on the x-axis and the position of the object on the y-axis

• Create a pie chart with time on the x-axis and the velocity of the object on the y-axis

• Plot a graph with time on the x-axis and the position, velocity, or acceleration of the object on the y-axis.

Tags

NGSS.MS-PS3-1

Describe the motion of an object in terms of distance and displacement.

• The motion of an object can be described in terms of distance as the total length of the path traveled, and in terms of displacement as the shortest distance between the initial and final position of the object.

• The motion of an object can be described in terms of distance as the speed of the object, and in terms of displacement as the acceleration of the object.

• The motion of an object can be described in terms of distance as the change in position, and in terms of displacement as the change in velocity.

• The motion of an object can be described in terms of distance as the total time taken, and in terms of displacement as the average speed of the object.

What is the formula for calculating speed?

• Speed = Time / Distance

• Speed = Distance / Time

• Speed = Distance * Time

• Speed = Distance - Time

Tags

NGSS.MS-PS3-1

How is velocity different from speed?

• Velocity includes direction, while speed does not.

• Velocity is the rate of change of position, while speed is the rate of change of time.

• Velocity is measured in kilometers per hour, while speed is measured in meters per second.

• Velocity is a scalar quantity, while speed is a vector quantity.

Explain the concept of motion graphs and their significance.

• Motion graphs are only used in art and have no scientific significance

• Motion graphs are important because they help in understanding and analyzing an object's motion, including its speed, direction, and changes in velocity.

• Motion graphs are only applicable to stationary objects

• Motion graphs cannot accurately represent an object's motion

Tags

NGSS.MS-PS3-1

How can you interpret the motion of an object from a graph?

• By counting the number of lines on the graph

• By measuring the color of the graph

• By analyzing the slope of the graph, where a steeper slope indicates faster motion and a shallower slope indicates slower motion. The direction of the slope also indicates the direction of the motion.

• By listening to the sound of the graph

Tags

NGSS.MS-PS3-1

Provide an example of an object with constant acceleration.

• Person riding a bicycle on a flat road

• Car moving at a constant speed

• Freely falling object near the surface of the Earth

• Rocket launching into space

Tags

NGSS.HS-PS2-1

How is acceleration calculated?

• Acceleration = (Final velocity - Initial velocity) / Time

• Acceleration = (Velocity / Time)

• Acceleration = (Distance / Time)

• Acceleration = (Force / Mass)