Advertisements
Advertisements
Question
State whether speed is a scalar or a vector quantity. Give reason for your choice.
Advertisements
Solution
Speed is a scalar quantity. This is because it has magnitude, but it does not specify direction. It is the distance travelled by a body per unit time.
APPEARS IN
RELATED QUESTIONS
Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
Under which condition is the magnitude of average velocity equal to average speed ?
The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How long does it take to travel 240 m ?
A ball hits a wall horizontally at 6.0 m s-1. It rebounds horizontally at 4.4 m s-1. The ball is in contact with the wall for 0.040 s. What is the acceleration of the ball ?
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.
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is velocity of the car?
A train travels with a speed of 60 km h-1 from station A to station B and then comes back with a speed 80 km h-1 from station B to station A. Find -
- The average speed
- The average velocity of the train.
Draw a diagram to show the motion of a body whose speed remains constant, but velocity changes continuously.
