Physics Review

What is a vector quantity?

• A quantity that is at rest

• A quantity that has magnitude, unit, and direction

• A quantity that explains why objects are in motion

• A quantity that has only a magnitude and a unit

What is the displacement of a cyclist who starts at a highway marker +3 km and ends at marker -7 km. Consider positive numbers as representing positions east of the center of town.

• 10 km [W]

• 10 km [E]

• 4 km [W]

• 4 km [E]

What is the distance travelled by a jogger who starts at highway marker + 1 km, jogs to -5 km, and then proceeds to marker +8 km?

• 4 km

• 7 km

• 13 km

• 19 km

What does a straight line on a graph of position versus time tell us about the motion of an object?

• The object is travelling with positive velocity

• The object is travelling with negative velocity

• The object is travelling with uniform velocity

• The object is travelling with zero velocity

How is average speed calculated?

• Average speed equals total distance divided by the change in time

• Average speed equals total distance multiplied by the change in time

• Average speed equals total displacement divided by the change in time

• Average speed equals total displacement multiplied by the change in time

How can you find the velocity at any given point on a curve of a position-time graph?

• Find the slope of the tangent to the curve at a given point

• Find the length of the tangent to the curve at a given point

• Find the slope of the straight line that joins the given point and the origin

• Find the length of the straight line that joins the given point and the origin

What is acceleration?

• An increase in velocity

• A decrease in velocity

• A change in the direction of velocity

• Any change in velocity

On a velocity-time graph, what does a straight sloped line always represent?

• Constant displacement

• Constant velocity

• Uniform acceleration

• Constant speed

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

• Find the slope of each straight line of the graph and add them together

• Find the length of each straight line and add them together

• Find the area under the graph

• Find the product of the slope of each line and the area under the graph

A cyclist accelerates uniformly from rest to 5.0 m/s in 5.0 s. Describe the straight line representing the motion of the cyclist on a velocity time graph.

• The line is horizontal from 5.0 m/s at 0 s and extends to 5.0 m/s at 5.0 s

• The line is descending from 5.0 m/s at 0 s to 0 m/s at 5.0 s

• The line is rising from 0 m/s at 0 s to 5.0 m/s at 5.0 s

• The line is vertical from 0 m/s at 5.0 s to 5.0 m/s at 5.0 s