Advertisements
Advertisements
प्रश्न
Define variable velocity and give one example.
Advertisements
उत्तर
When a body covers unequal distances in equal intervals of time in a specified direction, the body is said to be moving with a variable velocity.
Example: A rotating fan at a constant speed has variable velocity, because of continuous change in direction.
APPEARS IN
संबंधित प्रश्न
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 bicycle moving with a speed of 200 m/min.
A tortoise moves a distance of 100 metres in 15 minutes. What is the average speed of tortoise in km/h ?
An aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft’s altitude, how long will it take to reach the ‘sound barrier’ ?
A train starting from rest moves with a uniform acceleration of 0.2 m/s2 for 5 minutes. Calculate the speed acquired and the distance travelled in this time.
Express the following in m s-1.
18 km min-1
The velocity-time graph of a moving body is given below in Figure
The acceleration in parts AB, BC and CD.
What is the relation between distance and time when the body is moving with variable velocity?
A body projected vertically up with a velocity of 10 m/s reaches a height of 20 m. If it is projected with a velocity of 20 m/s, then the maximum height reached by the body is:
Give two examples of uniform circular motion from your daily life.
