acceleration,velocity,speed

A car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highway. Which of the following statements most accurately describes the motion of the car?

• The average velocity is 40 miles per hour.

• The total displacement of the trip is 300 miles.

• The average speed is 37.5 miles per hour.

• The car travels at 50 mph for the first half and 30 mph for the second half

A police car accelerates quickly to 60 meters per second in order to pursue a minivan that is recklessly speeding along the highway at 45 meters per second. How long will it take the police car to catch up if the minivan is 600 meters ahead of the police car at the beginning of the chase?

• 10 seconds

• 15 seconds

• 40 seconds

• 50 seconds

At time t = 1 min the car is traveling at a velocity of 20 meters per second, and at time t = 2 min the car reaches a velocity of 40 meters per second. Which statement best describes the car’s motion during this time interval?

• The car’s average acceleration is 0.33 m/s^2

• The car’s average speed is the same as the car’s average velocity.

• The car’s average velocity is 30 m/s, assuming a straight path of travel.

• The car’s velocity never drops below 20 m/s and never surpasses 40 m/s.

An object is dropped from the top of the Empire State Building. Which of the following statements best describes the motion of the object as it experiences air resistance during its downward fall?

• The speed will increase at a constant rate for its fall.

• The speed will decrease at a constant rate for its fall.

• Its speed remains constant for the fall.

• Its acceleration will decrease until the object starts moving with a constant speed.

All of the following are examples of speed except:

• A car traveling at 55 km/hr
• A snail hightailing it 45 mm/sec
• Jube timing himself at 23 seconds
• Lonnie running down the hall at 45 mph

All of the following are examples of speed except:

• Rambo dropkicking cheese at 98 miles/hr
• A piece of chocolate melting in your mouth
• Jube skydiving at 72 Km/Min
• Allison driving at 34 Meters/Second

Tags

CCSS.HSF-LE.A.1B

All of the following are examples of speed except:

• A student doing their homework
• A jaguar running through OMS at 45 miles per hour
• Aidan cleaning his bedroom at 20 meters/min
• Michelle jumping rope at 40 Km/hr

Tags

NGSS.MS-PS3-1

What is the formula to calculate speed?

• Speed = Distance x Time
• Speed = Distance/Time
• Speed = Time/Distance
• Speed = Time x Distance

Tags

CCSS.8.EE.C.7B

What is the difference between instantaneous speed and average speed?

• Average speed happens in a particular instant, Instantaneous speed is the speed of an object over a longer period of time.
• Instantaneous speed is never right, average speed is always right
• Instantaneous speed happens in a particular instant, Average speed is the speed of an object over a longer period of time.
• Do not pick this answer

How would you find the average speed of a marathon runner throughout an entire race?

• Ask a magic 8 ball
• You would take the entire distance the runner traveled and divide the distance by the total time it took the runner to complete the race.
• run along side them and eyeball it
• Ask Alexa