Acceleration
1. 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 7 seconds later, at the bottom of the slope, its speed is 39 m/s. What is the average acceleration?
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2. A car advertisement states that a certain car can accelerate from rest to 85 km/h in 9 seconds. Find the car's average acceleration.
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3. An eagle accelerates from 11 m/s to 27 m/s in 5 seconds. What is the eagle's average acceleration?
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4. You drop a rock from a bridge, and it takes 3.8 seconds for it to hit the river below. How many meters did the rock fall?
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5. You drop a rock from a bridge that is 48 feet high. For how long does the rock fall?
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Newton's Second Law of Motion
1. A 57-kg water-skier is being pulled by a speedboat. The force causes her to accelerate at 3 m/s2. What force causes this acceleration?
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2. How fast is a 1100-kg elevator accelerating if it is being acted upon by a force of 2200 N?
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3. What is the mass of a cart if it is accelerating at 21 m/s2 and is being acted upon by a force of 748 N?
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© 2018 Laura Glassel – lizzietutoring.blogspot.com
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