Ms-ps2-2 acceleration Notes

Acceleration

​Acceleration

Acceleration is a change in speed or change in direction of speed
Can be measured by measuring the change n velocity of an object
Velocity is the speed of an object as well as the direction that the object is moving

Multiple Choice

You are walking and start to slow down. Do you have acceleration? 

• yes
• no 

​Acceleration

Both velocity and acceleration are vectors
Vectors have a measurement as well as a direction
Acceleration is often thought of when something increases in speed, but it also occurs when something slows down or stays the same speed but changes direction

Multiple Choice

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car moving down a ramp

​Acceleration

If you have ever experienced riding in a car when it maintains the same speed, but moves around a corner - what do you notice happening? This is an example of acceleration by changing direction but not speed.

​Acceleration

Acceleration is calculated by dividing the change in velocity by the time it took for the change to occur

Multiple Choice

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval 

Multiple Choice

Acceleration only takes place when things speed up. 

• True
• False

Multiple Choice

A negative acceleration means that your object is _____. 

• Going to Wal-mart 
• running for president 
• speeding up 
• slowing down 

Multiple Choice

John Cena’s speed increases from 15 m/s to 25 m/s as he runs downhill over a 5 second period.

• 2 m/s²
• 10 m/s²
• 8 m/s²
• 2 m/s