3. Define speed for a moving object.
4. What do you mean by velocity of an object?
5. Define acceleration.
6. Give one example each of positive accelerati
7. The distance-time graph of a moving object is
about the nature of motion?
Answers
Answer:
5):
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
4):The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. ... Velocity is a physical vector quantity; both magnitude and direction are needed to define it.
6):Positive acceleration= A bus or car moving with increasing speed has positive acceleration. We can say that it is accelerating with the direction of travel. Negative acceleration=In the above example, if we apply the break, the speed of the car decreases. Then it has negative acceleration.
3):Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time.
1) The distance of a moving object in a given period time is called speed
2) The rate of change of positions of an object in a direction is called velocity
3) The rate of change in velocity is called acceleration
4) The positive acceleration is that with positive sign or positive
5) The nature of moving object with constant speed is straight line