Advertisements
Advertisements
Question
Which of the following statement is correct regarding velocity and speed of a moving body?
Options
velocity of a moving body is always higher than its speed
speed of a moving body is always higher than its velocity
speed of a moving body is its velocity in a given direction
velocity of a moving body is its speed in a given direction
Solution
velocity of a moving body is its speed in a given direction
Velocity is a vector quantity having a magnitude and a specific direction. So, velocity is nothing but speed in a particular direction.
APPEARS IN
RELATED QUESTIONS
What name is given to the speed in a specified direction ?
Under which condition is the magnitude of average velocity equal to average speed ?
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 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.
Give an example of motion in which the average speed is not zero but the average velocity is zero.
The speed of a car is 72 km h-1. Express it in m s-1.
A car is moving in a straight line with speed 18 km h-1. It is stopped in 5 s by applying the brakes. Find:
- the speed of car in m s-1
- the retardation and
- the speed of car after 2 s of applying the brakes.
For the motion with uniform velocity , how is the distance travelled related to the time ?
Figure shows the displacement of a body at different times .
Calculate the average velocity during the time interval 5 s to 9 s ,
[Hint : From 5 s to 9 s , displacement = 7 m - 3m = 4m]
What are the uses of equations of motion?