Skip to content
Philoid
Browse Saved
Back to chapter
Physics
1. Motion
Home · Class 9 · Physics · Ref. Book · 1. Motion
Prev
Next
Q60 of 139 Page 22

A ball hits a wall horizontally at 8.0 m/s-1. It rebounds horizontally at 4.4 m s-1. The ball is in contact with the wall for 0.040 s. What is the acceleration of the ball?

Initial velocity, u=8m/s

Final velocity ,v=-4.4m/s (the ball rebounds in opposite direction)


Time, t = 0.040 s



More from this chapter

All 139 →
58

A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 40 m in 50 seconds to reach the bookshop. After buying a book, he travels the same distance in the same time to reach back in the classroom. Find (a) average speed, and (b) average velocity, of the boy

59

A car travels 100 km at a speed of 90 km/h and returns with a speed of 30 km/h. Calculate the average speed for the whole journey.

1

What remain constant in uniform curcular motion?

1

What change continuously in uniform circular motion?

Questions · 139
1. Motion
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 25 26 26 26 27 28 29 30 31 32 33 34 34 35 36 36 37 37 37 38 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 33 34 34 35 35 36 36 37 37 38 39 40 41 42 43 44 45 46 47 1 49 50 51 1 53 54 55 56 57 58 59 60 61 62 63 64 65
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved