Accelerated Motion Quiz Review

The acceleration of an object can be found from which quantity of a velocity vs. time graph?

• the area under the graph

• the slope of the graph

• the y-intercept of the graph

• the x-intercept of the graph

Which of the following is not an example of acceleration?

• A car travels through a school zone at a constant speed

• A school bus slowing down at a stop sign

• A race car turns the corner on a track

• A truck driver presses down on the gas pedal

Alejandro walked 30 kilometers. It took him 3 hours to complete this trip. What was his speed?

• 10 m/s²

• 10 km/hr

• 10 m/s

• 10 m/s east

The graph above shows the velocity of three objects over time. Which, if any, of the objects are accelerating?

• I and II

• II and III

• I and III

• I, II & III

An athlete jogs at a constant velocity, and then jogs backs to his initial position with the same constant velocity. Which of the following graphs correctly shows the position of the athlete as function of time?

• 
• 
• 
• 

At which of the following times is the object at rest?

• 5 s

• 10 s

• 15 s

• the object is never at rest

What is the acceleration of the object at t = 15 s?

• 1.25 m/s²

• -0.8 m/s²

• -1.25 m/s²

• the object is not accelerating

A motorcyclist goes from 15 m/s to 35 m/s in 5 s. What is her acceleration?

• -0.25 m/s²

• 5 m/s²

• 4 m/s²

• -5 m/s²

The formulas for speed and velocity are very similar. Which pairing is correct?

• s = Δx/t ; v = x/t

• s = x/t ; v = Δx/t

• s = t/Δx ; v = t/x

• s = t/x ; v =t/Δx

The slope of a line on velocity time graph is zero. What does this tell you?

• The object is at rest (not moving)

• The object has positive acceleration

• The object has negative acceleration

• The object is moving at a constant velocity (no acceleration)