the definition of acceleration in kinematics, allows to find that the correct answer is:
2. speed up ( acceleration)
The kinematics study the movement of the body, the acceleration is defined as the change of the speed by the time in the interval
a = Δv / t
Where the bold letters indicate vectors, a is the acceleration, v the velocity and t the time
Analyzing this expression we see that for there to be a change in velocity, there must be an acceleration of the body.
Let's analyze the different claims
1. True. If it is stopped and you start to move there is an acceleration, therefore there is a change in speed, but after you are moving the acceleration becomes zero and there is no change in speed
2. True. Whenever there is acceleration there is a change in speed
3. False. Moving slowly does not change the acceleration, therefore there is no change in speed
4. True. If you are moving and you stop at this moment there is an acceleration, therefore there is a change in speed, but after being stopped the acceleration is zero and there is no change in speed
5. False. If you change the direction at the instant of change there is an acceleration but after you go in the opposite direction there is not acceleration therefore there is no change in speed.
In conclusion using the definition of acceleration in kinematics, we can find the answer the condition for a change in velocity, the correct statement is:
2. speed up ( acceleration)
Learn more here: brainly.com/question/5063616
