Speed And Velocity - Practice Questions & MCQ

I.   Speed

• Rate of change of distance with time.

• Formula-

           

                   

 

• Tips of Speed-

1. S.I. unit or meters per second.

2. Dimensions=

3. Speed is a scalar quantity.

•  E.g: A body covers a distance of 18m in 1 sec 

Using the formula of speed. 

 

II .   Average Speed and Instantaneous Speed

  

1.  Average Speed-

• Amount of total distance covered in total time.

• Formula-

,

•     E.g A body covers a total distance of 50 m with variable speed in 5 sec.

                           

                    

                    Average Speed = 10 m/s

•    Tips for average speed-

If an object or body covers s1 distance in t1 time and s2 distance in t2 time then average speed is calculated by the

Formula-

 

2.  Instantaneous Speed-

• It is the speed at that particular instant or small interval of time.

• Formula-

 

 

 

III.   Velocity

• Rate of change of displacement with time.

• Formula-

 

• Tips For velocity-

1. S.I. unit   m/s

2. Dimensions-

3. Velocity is a vector quantity. 

4. Velocity is also called speed in a definite (particular) direction.

 

IV.    Average Velocity  and Instantaneous Velocity

1. Average Velocity-

• Amount of total displacement covered in total time.

• Formula-

, 

 

2.   Instantaneous Velocity-

• It is Velocity at that particular instant or small interval of time.

• Formula-

 

 

 

V.     Uniform motion and Non-uniform motion

 

1. Uniform motion-

• If equal distance/displacement is covered in equal intervals of time, how small these intervals may be.

• Uniform speed-If equal distances are covered in equal intervals of time.

• Uniform velocity-If equal displacement are covered in equal intervals of time.

• Uniform speed and Uniform velocity is the same as uniform motion.

• For uniform motion along a straight line, the average and instantaneous velocities have the same values.

2. Non-uniform motion- 

•  If equal distance/displacement is covered in unequal intervals of time.

• Non-uniform speed-If equal distances are covered in unequal intervals of time.

• Non-uniform velocity-If equal displacement are covered in unequal intervals of time.

• Non-uniform speed and Non-uniform velocity  is same as Non uniform motion