# The Meaning of Acceleration. Constant and Non-Constant Acceleration. Gravitational Acceleration

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Kinematics Learning Material
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3.7The Meaning of Acceleration. Constant and Non-Constant Acceleration. Gravitational Acceleration

## The Meaning of Acceleration. Constant and Non-Constant Acceleration. Gravitational Acceleration Revision Questions

1. The following motion map shows a moving object photographed in time clocks equal to 0.2 s each. What is the acceleration of the object if one unit in the arrows' length represents 2 m/s?

(Hint! Consider only the arrows' length, not the distance between the dots).

1. 10 m/s2
2. -10 m/s2
3. 5 m/s2
4. 1 m/s2

2. A car is moving at 24 m/s when immediately the driver notices an obstacle in front of him. He immediately presses the brakes and decelerates at 6m/s2. How long does it take the car to stop?

1. 96 s
2. 6 s
3. 4 s
4. 3 s

3. The velocity vs time graph of a moving object is shown below.

What is the instantaneous acceleration at t = 4.2 s?

1. 4 m/s2
2. -4 m/s2
3. 2 m/s2
4. -2 m/s2

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