BEST PRACTICE: Representing Motion

The graph shows the motion of a runner. How long did it take her to cover 25.0 m?

• 4.5 s

• 4.0 s

• 5.0 s

• 5.5 s

The graph shows the motion of a runner. How far is she at 7.0 s?

• 35.0 m

• 32.5 m

• 31.0 m

• 40.0 m

The graph describes the motion of a car. Assume that the positive direction is east and the negative direction is west. When was the car at 25.0 m west from the origin?

• at 4.0 s

• at 5.5 s

• at 6.0 s

• at 3.5 s

The graph describes the motion of a car. Assume that the positive direction is east and the negative direction is west. What was the total distance traveled by the car at 7.0 s?

• -175.0 m

• 175.0 m

• 150.0 m

• 125.0 m

The graph shows the motion of a student riding his skateboard along the sidewalk. What is his average speed?

• 12 m/s

• 0.58 m/s

• 1.7 m/s

• 2.0 m/s

The position-time graph shows the motion of four cows walking from the pasture back to the barn. Rank the cows according to their average velocity, greatest first.

• Elsie, Bessie, Moolinda, Dolly

• Moolinda, Dolly, Bessie, Elsie

• Dolly, Moolinda, Bessie, Elsie

• Elsie, Bessie, Dolly, Moolinda

The graph shows the position-time graph of Jim’s movement across the hallway. The origin is at one end of the hallway. What was the total distance in meters traveled by Jim? Express the answer up to a whole number. No need to write units.

The graph shows the position-time graph of Jim’s movement across the hallway. The origin is at one end of the hallway. What was Jim's total displacement in meters? Express the answer to a whole number. No need to write units.

You drive a car for 3.0 h at 97 km/h, then for another 3 h at 72 km/h. What is your average velocity in km/h? Express the answer in 2 significant figures. No need to write the units.

The given figure is a graph of two people running. Which statement is true about runners A and B? Select all that apply.

• Runner A is faster than Runner B.

• Runner B is faster than Runner A.

• At point P, both runners have the same distance traveled.

• At point P, both runners are at the same position.