Motion Concepts

What is the formula for velocity?

• v = d + t

• v = d - t

• v = d x t

• v = d / t

How do you find speed from a distance-time graph?

• Counting the graph lines

• Finding the graph's slope

• Measuring the graph's area

• Calculating the y-intercept

What does a horizontal line on a speed-time graph indicate?

• No motion

• Constant speed

• Acceleration

• Changing speed

What is the difference between speed and velocity?

• Velocity is scalar, speed is vector

• Speed measures rate and direction, velocity only measures rate

• Speed is scalar measuring rate of motion, velocity is vector measuring rate and direction of motion.

• Speed and velocity are the same

Define displacement in motion.

• The change in position of an object.

• The speed of an object.

• The force on an object.

• The time for an object to move.

What is the difference between distance and displacement?

• Distance is the total path length, displacement is the total path length.

• Distance is the total path length, displacement is the shortest distance from start to end.

• Distance is the shortest distance between two points, displacement is the total path length.

• Distance is the shortest distance between two points, displacement is the shortest distance from start to end.

What is the formula for momentum?

• p = ma

• p = mv^2

• p = m^2v

• p = mv

How is speed calculated?

• Distance plus time

• Distance divided by time

• Time multiplied by distance

• Speed multiplied by time

Explain distance in motion.

• Time taken for movement

• Force exerted by moving object

• Length of path traveled

• Speed of moving object

An airplane starts at rest and then accelerates down a runway for 20 s. At the end of the runway, its velocity is 80 m/s north. What is its acceleration? (hint: at rest means that velocity initially is 0 m/s)

• 0.25 m/s² north

• -0.25 m/s² south

• 4 m/s² north

• -4 m/s² north