Kinematics, velocity vs time graphs, kinematic equations

The graph respresents

• no motion
• constant velocity
• increasing velocity
• decreasing velocity

Calculate the acceleration for segment A.

• 2 m/s²
• 2 m/s
• -2 m/s²
• 0 m/s²

What is happening between 2 and 3 seconds?

• The object is not moving.
• The object is not accelerating.
• The object is slowing down.
• The object is speeding up.

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

SI unit of acceleration is-

• ms^-1

• ms^-2

• ms²

• none of these

Can be measured in seconds (s)

• Distance
• Time
• Speed
• Acceleration

Acceleration is defined as the CHANGE in 

• time of motion to another place. 
• velocity 
• distance 
• speed

the unit of acceleration is

• (m/s²)

• jouls

• m

• s

A negative acceleration means that your object is  

• constant

• speeding up

• at rest

• slowing down

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down