Acceleration and Distance/Rate/Time

What does speed measure?

• How fast an object is going

• How far an object has traveled

• the rate at which an object slows down

• the rate at which an object speeds up

Which of the following can be used to measure an object's speed?

• Joules

• Newtons

• Miles per hour

• Kilometers per second per second

What does acceleration measure?

• how fast an object is going

• the fastest speed that an object can reach

• the force with which an object travels

• the rate at which speed or direction changes

Tags

CCSS.7.RP.A.3

What is the difference between positive and negative acceleration?

• positive acceleration applies to fact objects; negative acceleration applies to slow objects

• Positive acceleration occurs when object speed up; negative acceleration occurs when object slow down

• Positive acceleration applies to objects traveling on earth; negative acceleration applies to objects traveling in space

• Positive acceleration is expressed in meters per second; negative acceleration is expressed in kilometers per hour

Which of these is an example of acceleration?

• a car coasts along at 40m/h

• A car is parked on the side of the road

• A speeding car brakes to a stop

• A car speeds along at 100km/h

Which of these statements is true?

• Acceleration in the direction of motion slows you down

• Acceleration in the direction of motion speeds you up

• Acceleration against the direction of motion has no effect on your speed

• Acceleration against the direction of motion speeds you up

If you're sitting still in a chair reading this, what is your acceleration?

• 0 m/s/s

• 1 m/s/s

• 2 m/s/s

• 3 m/s/s

When would acceleration increase most?

• Rolling along a flat plane

• Rolling down a steep hill

• Braking to a stop

• rolling up a gently sloping hill

Tags

CCSS.HSF.IF.B.4

How does braking stop a bike?

• it makes the wheels turn backwards a few times

• it pumps up the tires slightly so they cannot roll forward

• it causes a quick negative acceleration against the bike's forward motion

• it causes a quick positive acceleration against the bike's backward motion

You're in a moving car. Which of the following changes would always mean there's been some acceleration?

• a change in temperature

• a change in time

• a change in location

• a change in speed