Understanding Motion through Experience (Advanced)

CBSE Science. Optional Advanced level: frames of reference, relative motion, scalars and vectors, adding displacements, distance in the nth second. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.

Open a printable sample sheet Cheat sheet: formulas and key points

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 body with initial velocity 3 m/s moves with an acceleration of 6 m/s². The distance it covers in the 10th second is:
1. 63 m
2. 330 m
3. 66 m
4. 60 m
Answer
(d) 60 m
sₙ = u + a(2n − 1)/2 = 3 + 6 × 19/2
2.
A girl walks 60 m east and then 80 m north. The magnitude of her displacement is:
1. 140 m
2. 20 m
3. 100 m
4. 105 m
Answer
(c) 100 m
the two walks are at right angles: √(60² + 80²) = 100
3.
Which of these is a scalar quantity?
1. acceleration
2. force
3. displacement
4. speed
Answer
(d) speed
speed has magnitude only

Section B · short answer

4.
A scooter moving at 14 m/s accelerates uniformly at 9 m/s². How far does it travel in the 10th second?
Answer
99.5 m
sₙ = 14 + 9(2 × 10 − 1)/2
5.
A ball rolling down a slope starts at 6 m/s and covers 23 m in the 9th second. Find its acceleration.
Answer
2 m/s²
23 = 6 + a × 17/2, so a = 2 × 17 ÷ 17

Section C · long answer

6.
On a map (in km), Vikram's house is at A(3, 1), the bus stop at B(7, 1), a traffic signal at C(7, 13) and the school at D(8, 13). Vikram walks from A to B, then rides the school bus from B to D through C. Find (a) the distance walked, (b) the distance by bus and (c) the magnitude of the displacement from house to school.
Answer
(a) 4 km; (b) 13 km; (c) 13 km
(a) AB = 4; (b) BC + CD = 12 + 1; (c) AD = √(5² + 12²) = 13

Fresh sheets for your child

In the app, every Understanding Motion through Experience (Advanced) 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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