Advertisements
Advertisements
Question
What is the Differnece between speed and velocity ?
Advertisements
Solution
(i) Speed is a scalar quantity, whereas velocity is a vector quantity.
(ii) Speed of a body is the distance travelled by it per unit time, whereas the velocity of a body is the distance travelled by it per unit time in a given direction.
(iii) Speed is always positive, while velocity can be both positive and negative, depending upon the direction.
APPEARS IN
RELATED QUESTIONS
Under which condition is the magnitude of average velocity equal to average speed ?
State whether speed is a scalar or a vector quantity. Give reason for your choice.
Arrange the following speed in increasing order (keeping the least speed first
A scooter moving with a speed of 30 km/h.
A motorcyclist drives from place A to B with a uniform speed of 30 km h-1 and returns from place B to A with a uniform speed of 20 km h-1. Find his average speed.
If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest ?
A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s) : 0 2 4 6 8 10
Speed (m/s) : 4 8 12 16 20 24
Draw the speed-time graph by choosing a convenient scale. From this graph :
(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.
Which of the following could not be a unit of speed?
A train is moving with a velocity of 90 km h-1 . It is brought to stop by applying the brakes which produce a retardation of 0.5 ms-2 Find :
(i) The velocity after 10 s , and
(ii) the time taken by the train to come to rest .
Draw a diagram to show the motion of a body whose speed remains constant, but velocity changes continuously.
