# 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/s2
• 0.5 m/s2
• 0.3 m/s2
• 0.8 m/s2
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/s2
• 5 m/s2
• 3 m/s2
• 7 m/s2
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.
• 10 s
• 50 s
• 30 s
• 70 s
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/s2
• 9 m/s2
• 3 m/s2
• 4 m/s2