Physics

1A body travels the first half of a journey at 20 m/s and the second half at 30 m/s. Its average speed is

2A velocity–time graph rises from 0 to 20 m/s in 4 s, stays constant for 6 s, then falls to 0 in 2 s. The total distance is

3A car accelerates uniformly from rest to 20 m/s in 5 s. The distance travelled is

4A car decelerates uniformly from 25 m/s to rest over 50 m. Its deceleration is

5Using a vernier caliper, main scale 2.3 cm and vernier 6th line coincides (0.01 cm per division). The reading is

6A body decelerates uniformly from 30 m/s to rest in 6 s. The deceleration is

7A car accelerates uniformly from rest to 20 m/s in 5 s. Its acceleration is

8A body moves in a circle of radius 2 m at 4 m/s. Its centripetal acceleration is

9Which instrument measures the internal diameter of a test tube?

10A stone is dropped from rest from the top of a building and hits the ground after 2 s. Find the height of the building.