Advertisements
Advertisements
प्रश्न
Convert a speed of 54 km/h into m/s.
Advertisements
उत्तर
We have to convert 54 km/h into m/s .
54 km/hr = `((54)(1000))/3600` m/s
= 15 m/s
APPEARS IN
संबंधित प्रश्न
What does the odometer of an automobile measure?
Abdul, while driving to school, computes the average speed for his trip to be 20 km h−1. On his return trip along the same route, there is less traffic and the average speed is 30 km h−1. What is the average speed for Abdul’s trip?
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
A car accelerates at a rate of 5 m s-2. Find the increase in its velocity in 2 s.
Figure shows the displacement of a body at different times .
Calculate the velocity of the body as it moves for time interval :
(i) 0 to 5 s,
(ii) 5 s to 7 s
(iii) 7 s to 9 s.

A body moves from rest with uniform acceleration and travels 270 m in 3 s. Find the velocity of the body at 10 s after the start.
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 .
Define variable velocity and give one example.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.

Derive th e equation of motion.
S = ut+ `1/2` at2,
Where the symbols have their usual meanings
