Q2. The odometer of a car reads 12000 km at the start of a trip and 12400 km at the end of the trip. If the trip took 8 hours, find the average speed of the car.
Define : Shearing, Sorting, Dyeing
Give reasons:
(i)Why is a new quilt warmer than an old one?
(ii)Why are iron rims heated red hot before fixing them on cart wheels?
(iii)Why are the bottoms of cooking utensils often kept black?
(i) Draw the shape of distance -time graph for-
(a) a man waiting for a bus at one point on a bus-stand.
(b) a man walking on a level, straight and narrow road with a constant speed.
(ii) Give the SI unit of speed.
(iii)What is simple pendulum?
(iv)The distance from Delhi to Chandigarh is 250 km. A bus travels at an
average speed of 50km/h. How much time would it take to travel
from Delhi to Chandigarh?
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