Answer to Question #156767 in Mechanics | Relativity for joy

Question

1. Write dawn the relationship between speed, distance and time. What is the unit of speed? Is it scalar or vector? Why?

2. Write down the equation of average speed?

3. What is instantaneous speed?

4. What does distance time graph give?

5. What is the meaning of the gradient of distance time graph?

6. What is the equation of velocity? What is the unit? Is it vector or scalar?

7. What is acceleration? What is the unit of acceleration? Is it vector or scalar?

8. What do you mean by uniform acceleration?

9. What does the gradient of velocity-time graph show?

10. Write down the equation of average velocity.

11. what does the area of velocity-time graph give?

Answer 1

1) $speed = distance$ $travelled$ $/time$ $taken$

The unit for speed is $m/s$

Speed is a scalar quantity since it has magnitude only but no direction.

2) $average$ $speed =total$ $distance$ $covered$ $/total$ $time$ $taken$

3) The instantaneous speed is the speed of an object at a particular moment in time.

4) The distance time graph give the position, the distance covered, and speed of the body at any instant of time.

5) The gradient of distance time graph represent the speed of the moving object.

6) velocity $=$ change of displacement $/$ time

The unit of velocity is $m/s$

Velocity is a vector quantity since it has both magnitude and direction

7) Acceleration is defined as change of velocity per unit time.

The unit for acceleration is $m/s^{2}$

Acceleration is a vector quantity since it has both magnitude and direction.

8) Uniform acceleration occurs when velocity is increasing at a constant rate. It means that the acceleration is constant.

9) The gradient of velocity-time graph represent acceleration and the area under a velocity-time graph represents the displacement of the moving object.

10) average velocity $=$ total displacement $/$ total time taken

11) The area of velocity-time graph give the displacement of the moving object.