If a particle has negative velocity and negative acceleration, its speed

What is negative acceleration?

Negative acceleration is called …………

The position time graph for a particle moving along X axis has been shown in the fig. At which of the indicated points the particle has (i) negative velocity but acceleration in positive X direction. (ii) positive velocity but acceleration in negative X direction. (iii) received a sharp blow (a large force for negligible interval of time)?

What is meant by negative acceleration?

Give an example of negative acceleration.

What is the other name of negative acceleration ?