Advertisements
Advertisements
प्रश्न
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 ?
उत्तर
(d) We have:
Distance (d) = 240 m
Speed (v) = 30 m/s
We can find the time as :
`"Time" = "Distance travelled"/"Speed"`
So ,
t = `240/30` s
= 8 s
APPEARS IN
संबंधित प्रश्न
What is the Differnece between speed and velocity ?
What does the odometer of an automobile measure?
Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging?
- from A to B and
- from A to C?
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
When is a body said to be in motion?
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.
A speeding car changes its velocity from 108 kmh−1 to 36 kmh−1 in 4 s. Calculate its deceleration in
- ms−2
- kmh−2.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.