Unit 3: Motion in one dimension

In the graph above, what is the correct description of any location to the left of the zero?

• negative displacement

• negative distance

• negative position

• negative change of displacement

What is the SI unit of acceleration?

• m/s

• m²/s

• m/s²

• m*s²

The graph shown describes the motion of a cyclist. The graph illustrates that the acceleration of the cyclist

• is constant

• decreases

• increases

• is zero

The graph above describes the motion of a ball. At what point is the speed of the ball equal to its speed at B?

• A

• C

• D

• none of the above

Slope of displacement -time graph gives

• velocity

• speed

• acceleration

• displacement

A car moving on a straight line path covers a distance of 2 km due east in 100 s, the speed & velocity of the car is

• 20 m/s and 20 m/s

• 20 m/s and 40 m/s

• 20 m/s and 20 m/s due south

• 20 m/s and 20 m/s due east

An increase or decrease in speed or change in direction is known as-

• acceleration

• time

• speed

• velocity

A trucker drives with an average velocity of 27 m/s towards the east on a perfectly straight highway. What will the trucker's displacement be after 2 minutes?

• 97 m; east

• 190 m; east

• 1600 m; east

• 3200 m; east

A race car accelerates from 0 m/s to 30 m/s with a 45 m displacement. What is the vehicle's acceleration?

• 2 m/s²
• 5 m/s²
• 10 m/s²
• 15 m/s²

Which of the following is a value for the acceleration of objects in free fall?

• 4.905 m/s²
• -4.905 m/s²
• 9.81 m/s²
• -9.81 m/s²