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Speed And Velocity MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

Quick Facts

  • Speed and velocity is considered one of the most asked concept.

  • 46 Questions around this concept.

Solve by difficulty

A body travels 100 km southwest and then 502 km in the northern direction. The total magnitude of the velocity if the time taken is 1 hr .|

A particle is moving with velocity \vec{v}=K(y\hat{i}+x\hat{j}),where\; K is a constant. The general equation for its path is

A body moves along a semi-circle of radius (r) 1 m from point A to B in 3 seconds then its speed is

Which graph corresponds to an object moving with a constant negative acceleration and a positive velocity?

 

Concepts Covered - 1

Speed and velocity

I.   Speed

  • Rate of change of distance with time.

  • Formula-

       Speed = Change in distance  change in time v= distance  speed 

 

  • Tips of Speed-

1. S.I. unit ms1 or meters per second.
2. Dimensions= LT1
3. Speed is a scalar quantity.

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

Using the formula of speed.  v= distance  time =18 m1 s18 m/s

 

II .   Average Speed and Instantaneous Speed

  

  1.  Average Speed-

  • Amount of total distance covered in total time.

  • Formula-

Average speed = total distance covered  total time taken vav=st

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

               vav=st50 m5 s=10 m/s

                    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- Vav=s1+s2t1+t2

 

  1.  Instantaneous Speed-

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

  • Formula-

vinst =limΔt0ΔxΔt

 

III.   Velocity

  • Rate of change of displacement with time.

  • Formula-

V= displacement  time  

  • Tips For velocity-

  1. S.I. unit -   m/s

  2. Dimensions- LT1

  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 distance covered in total time.

  • Formula-

Average Velocity = Total Displacement  Total time taken ,Vavg =Snet t

 

  1.   Instantaneous Velocity-

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

  • Formula-

Vinst =limΔt0ΔxΔt

 

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 distance 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 same as uniform motion.

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

  1. Non uniform motion-

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

  • Non uniform speed-If equal distance 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

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Speed and velocity

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