27 ms 2 While traveling along a highway a driver slows from 24 ms to 15 ms in 12 seconds What is the automobiles acceleration Remember that a negative value indicates a slowing down or deceleration ID: 673481
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Slide1
Acceleration ReviewSlide2
A skater increases her velocity from 2.0 m/s to 10.0 m/s in 3.0 seconds. What is the skater’s acceleration?
2.7 m/s
2Slide3
While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile’s acceleration? (Remember that a negative value indicates a slowing down or deceleration.)
-0.75 m/s
2Slide4
B
C
ASlide5
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?
-8.9 m/s
2Slide6
A helicopter’s speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?
7 m/s
2Slide7
As she climbs a hill, a cyclist slows down from 25 mi/
hr
to 6 mi/
hr
in 10 seconds. What is her deceleration?
-
1.9
mi/
hr
/sSlide8Slide9
After traveling for 6.0 seconds, a runner reaches a speed of 10 m/s. What is the runner’s acceleration?
0.6 m/s2Slide10
BSlide11
A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. What is the skateboarder’s acceleration?
-2.33 m/s2Slide12
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
6 m/s2Slide13
CSlide14
A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration ?
Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?
2.67 m/s2
This is a lower acceleration.Slide15
A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s average acceleration.
10 km/h/sSlide16
A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration?
2 m/s2Slide17
_____ a. At what time was the car stopped?
_____ b. At what time did the car have the greatest velocity?
_____ c. What was the greatest velocity?
_____ d. At what time(s) was the car accelerating?
_____ e. How fast was the car going at 1.0h?
_____ f. What is the acceleration at 0.9 hr?Slide18
A runner covers the last straight stretch of a race in 4 s. During that time, he speeds up from 5 m/s to 9 m/s. What is the runner’s acceleration in this part of the race?
1m/s2Slide19
You are traveling in a car that is moving at a velocity of 20 m/s. Suddenly, a car 10 meters in front of you slams on it’s brakes. At that moment, you also slam on your brakes and slow to 5 m/s. Calculate the acceleration if it took 2 seconds to slow your car down.
-7.5 m/s2Slide20
CSlide21
A ball is dropped from the top of a building. After 2 seconds, it’s velocity is measured to be 19.6 m/s. Calculate the acceleration for the dropped ball.
9.8 m/s2Slide22
A driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. What is his acceleration?
12 km/h/sSlide23
A slug traveling at 3 mm/h, north decided to race the slug next to him increasing his velocity to 5 mm/h, north in one hour. What was the slug’s acceleration?
2 mm/h2 northSlide24Slide25
In a summer storm, the wind is blowing with a velocity of 8 m/s north. Suddenly in 3 seconds, the wind’s velocity is 23 m/s north. What is the wind’s acceleration?
5 m/s2 northSlide26