Science Chapter 1

While traveling along a highway a driver slows from 24 m/s to 15 m/s is 12 sec. What is the automobile's acceleration?

a= -.75 m/sec

As she climbs a hill, a cyclist slows down from 25 mi/s to 6 mi/s in 10 seconds. What is her deceleration?

a= -1.9 mi/sec

A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 30 seconds. What is the skateboarder's acceleration?

a= -2.33 mps

A parachute on a racing dragster opens and changes the speed of the car from 85 m/s to 45 m/s in a period of 4.5 seconds. What is the acceleration of the dragster?

a= -8.89m/sec

After 30 s, a runner is sprinting at 3 m/s. But, 10 s later, the runner is sprinting at 3.8 m/s. What is the runner's acceleration during the time?

a= 0.04 m/s

A car was moving at 14 m/s. After 30 s, its speed increased to 20 m/s. What was the acceleration during this time?

a= 0.2 meters

Han's younger sister is riding her tricycle in a straight line. After 3 s, her speed is 0.5 m/s. After 5 s, her speed is 1.5 m/s. What is her acceleration during this time?

a= 0.5 m/s

After traveling for 6.0 seconds, a runner reaches a speed of 10 m/s. What is the runner's acceleration?

a= 1.67 m/s

Kiko is coasting on her bicycle down a hill. After 3 s, her speed is 10 m/s. After 8 s, her speed is 25 m/s. What is her acceleration during this time?

a= 3 m/s

A helicopter's speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?

a= 7 m/s

Nicholas walked to Laura's house. It is 6 miles from Nicholas's house to Laura's house. It took Nicholas 2 hours to get there. How fast did Nicholas go?

s= 3 miles/hrs

If Walter rode 15 miles at 5 miles per hour, how long was Walter traveling?

t= 3 hrs