# Practice-3 on Speed, Velocity, and Acceleration

Question 1: A quantity used to measure how the velocity changes over time is called

- speed
- velocity
- energy
- acceleration
- none of the above

Question 2: A school child throws a ball downward from rest and then realized that the ball covers a distance of 1.0 m in a time of 5.0 s.

Calcualte the ball's acceleration.

- 1 m/s
^{2}
- 0.5 m/s
^{2}
- 0.3 m/s
^{2}
- 0.8 m/s
^{2}

Question 3: A motorbike runs 10 meters in the first second from point A to point B, then runs 15 more meters from B to C in the next second, and finally, run for 20 meters from C to D in the last second.
Calculate the acceleration of the motorbike.

- 10 m/s
^{2}
- 5 m/s
^{2}
- 3 m/s
^{2}
- 7 m/s
^{2}

Question 4: A motorbike starts from rest, and then goes through a contant acceleration and travels a distance of 1000 meters.

The motorbike reaches a final speed of 100 meters/second.

Calcualte the time it takes the motorbike to cover 1000 meters.

Question 5: Assume a boat traveling at constant speed

- can not change direction.
- can change direction.
- has a postive acceleration.
- none of the above

Question 6: A school child throws a ball downward from rest and then realized that the ball covers a distance of 2.0 m in a time of 4.0 s.

Calcualte the ball's average speed.

- 1 m/s.
- 0.5 m/s.
- 0.3 m/s.
- 0.3 m/s.

Question 7: Which two quantities will always have the same magnitude?

- acceleration and velocity.
- instantaneous speed and instantaneous velocity.
- acceleration and speed.
- instantaneous acceleration and speed.

Question 8: Which of the following quantities relating to motion is not a vector?

- acceleration.
- velocity.
- speed.
- none of the above

Question 9: A car starts from rest and reaches 40 m/s in 10 seconds.

The average acceleration of the car is

- 10 m/s
^{2}
- 9 m/s
^{2}
- 3 m/s
^{2}
- 4 m/s
^{2}

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Date of last modification: 2022