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1. A car advertisement states that a certain car can accelerate from rest to 80 km/h in 7 seconds. Find the car’s average acceleration.
2. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 5 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
3. A roller coaster is moving at 35 m/s at the bottom of a hill. Four seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the coaster?
1. A car advertisement states that a certain car can accelerate from rest to 80 km/h in 7 seconds. Find the car’s average acceleration.
2. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 5 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
3. A roller coaster is moving at 35 m/s at the bottom of a hill. Four seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the coaster?
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Answer:
1. 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. 10-2 = 2m/s² 4.
2. the rate of change of velocity per unit of time.
a = v−u/t
= (22-4)/3
= 6 m/s^2
3. -5m/s square
Explanation:
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