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Class 9 Describing Motion Around Us worksheet
CBSE Science. Speed, velocity, acceleration, equations of motion. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
A car travels 160 km in 4 hours. Its average speed is:
- 44 km/h
- 640 km/h
- 80 km/h
- 40 km/h
Answer
(d) 40 km/h
160 ÷ 4 = 40
- 2.
A speed of 180 km/h in m/s is:
- 50 m/s
- 648 m/s
- 180 m/s
- 55 m/s
Answer
(a) 50 m/s
× 5/18: 180 × 5/18 = 50
- 3.
A body's velocity changes from 7 m/s to 10 m/s in 3 s. Its acceleration is:
- 3 m/s²
- 2 m/s²
- 3.33 m/s²
- 1 m/s²
Answer
(d) 1 m/s²
(10 − 7) ÷ 3 = 1
Section B · short answer
- 4.
A bus travels at 57 km/h for 4 h and then at 35 km/h for 4 h. Find its average speed. (Give the answer to 2 decimal places where needed.)
Answer
46 km/h
total distance 368 km ÷ total time 8 h
- 5.
A car moving at 11 m/s is brought to rest in 8 s. Find its acceleration. (Give the answer to 2 decimal places where needed.)
Answer
−1.38 m/s²
a = (0 − 11) ÷ 8; the minus sign means it is slowing down
Section C · long answer
- 6.
A train starts from rest and accelerates uniformly at 2 m/s² for 6 s. Find its final speed and the distance it covers. (Give the answer to 2 decimal places where needed.)
Answer
12 m/s; 36 m
v = at = 12; s = ½at² = ½ × 2 × 36
Fresh sheets for your child
In the app, every Describing Motion Around Us sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
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