Motion in one dimension word problems

An automobile slows from 26 m/s to 18 m/s. Its acceleration is −2.0 m/s^2 . How much time does it take for the vehicle to slow down?___________

Tags

NGSS.HS-PS2-1

Kim took 5 hours to complete a journey with an average speed of 80 km/h. For the first 3 hours, she travelled at an average speed of 60 km/h. What was her average speed for the remaining time of the journey? (a)   km

An oil tanker took 7.2 hours to travel from city A to city B at an average speed of 60 mph. If a passenger boat took 1.8 fewer hours than the oil tanker to complete the same journey, what was the average speed of the passenger boat? (a)   mph

If a falling rock undergoes a 4v of 112 m s due to an a of 9.8 m/s2 , how long did it fall? (a)  

 The velocity of a car increases from 2.0 m/s to 16.0 m/s in a time period of 3.5 s. What was the average acceleration? (a)  

Tags

NGSS.HS-PS2-1

If a fish experiences an a 

 $$9.8m/s^2$$ 

  of  over a period of 1.84s, what was the average velocity? (a)  

A runner increases his velocity from 0 m/s to 20 m/s in 2.0 s. What was his average acceleration? (a)  

Tags

NGSS.HS-PS2-1

A runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s. What was his average acceleration?

(a)  

Tags

NGSS.HS-PS2-1

A fast camel travelled 180 miles in 4 hours and 156 miles in 3 hours. What was the average speed for the whole journey? (a)   miles/hours

Andy took a bus and then walked from his home to downtown. For the first 1.6 hour, the bus drove at an average speed of 15 km/h. For the next 0.4 hours, he walked at an average speed of 4.5 km/h. What was the average speed for the whole journey? (a)   km/h