Which is best answer for each? Explain 1) When the velocity and acceleration of

Question

Which is best answer for each? Explain

1) When the velocity and acceleration of an object are in same direction the object a. will change direction b. will remain at same speed c. will decrease its speed d. will increase its speed e. could do any of the above depending on the magnitude of the velocity and acceleration

2) When the velocity and acceleration of an object are in opposite directions the object a. will change directions b. will remain at the same speed c. will decrease its speed d. will increase its speed e. could do any of the above depending on the magnitudes of the velocity and acceleration

3) When a ball that is rolled up a constant incline reaches the highest point in its path, its a) velocity is zero and its accleration is zero b) velocity is zero and it acceleration is not zero c) velocity is not zero and its acceleration is zero d) velocity is not zero and its acceleration is not zero e. none of these

Explanation / Answer

1 ans is D

acceleretion in the direction of velocity increase its speed

2 ans c

acceleretion opposite to v decrease its speed first

3. ans b because g(a due to gravity always working)

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