COM for idk

What’s used to measure speed?

• Distance / Time

• Time / Distance

• Mass x Acceleration

• kg N / S^2

What does it take to change the direction of an object?

• An uneven center of mass

• An unbalanced force

• Multiple forces

• Uneven intertia

How do you calculate speed given units in meters and seconds?

• Meters / second

• Seconds / meter

• Mass x acceleration

• Meters / mass

What is the acceleration when something is rolling smoothly?

• 0

• Equal to its velocity

• Negative

• Positive

When an object is slowing down, it is...

• Decelerating

• Accelerating

• Having a low center of mass

• In intetia

If Brooke pushes a block at 40 N to the left and Bruce pushes it at 60 N to the right, will it move?

• Yes

• No

• Depends on the center of mass

• Depends on the inertia

Which center of mass makes a car safer?

• Lower

• Higher

• In the front

• In the back

How do airbags stop people?

• They increase the deceleration, reducing the forces

• They decrease the deceleration, increasing the forces

• They increase the acceleration, increasing the forces

• They decrease the acceleration, reducing the forces

What numbers do we care about when looking at car safety?

• Occupant fatalities

• Occupant fatalities and fatalities in other vehicles

• Fatalities in other vehicles

• Occupant fatalities and fatalities in other vehicles, and car type

When the line on a distance / time graph goes down, what does that mean?

• The object is moving backwards

• The object has negative intertia

• The object is not moving

• The object is moving backwards in time