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CBSE · Class 7 · Science

Measurement of Time and Motion

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Show your working for Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
The SI unit of time is the:
  1. hour
  2. day
  3. minute
  4. second
2.
A cyclist covers 570 m in 19 s. What is the speed?
  1. 30 m/s
  2. 60 m/s
  3. 49 m/s
  4. 570 m/s
3.
A speed of 95 m/s in km/h is:
  1. 475 km/h
  2. 95 km/h
  3. 342 km/h
  4. 352 km/h
4.
A car moves at 69 km/h for 2 hours. How far does it go?
  1. 207 km
  2. 69 km
  3. 71 km
  4. 138 km
5.
How long does it take to travel 220 km at 110 km/h?
  1. 2 hours
  2. 3 hours
  3. 110 hours
  4. 4 hours
6.
A pendulum takes 16 s for 10 oscillations. What is its time period?
  1. 1.6 s
  2. 3.2 s
  3. 16 s
  4. 2.6 s
7.
An hourglass measures time using:
  1. marks on a candle as it burns down
  2. a swinging pendulum
  3. sand flowing through a narrow neck
  4. the moving shadow of the Sun
8.
Which of these is UNIFORM linear motion?
  1. a child running and then walking
  2. a train slowing into a station
  3. a car on a straight road at a steady 60 km/h
  4. a ball rolling to a stop
Section B — Short answer8 × 2 = 16 marks
9.
What is a simple pendulum?
10.
A runner covers 600 m in 50 s. Find the speed in m/s.
11.
Change 126 km/h into m/s.
12.
How many seconds are there in (a) 4 minutes (b) 2 hours?
13.
One ghatika is 24 minutes. How many minutes are there in 30 ghatikas? How many hours and minutes is that?
14.
A pendulum took 22 s, 22 s, 21 s for 10 oscillations in three tries. Find the average time for 10 oscillations, and the time period.
15.
Is each motion "uniform" or "non-uniform"? (a) a car on a straight road at a steady 60 km/h (b) a bus in city traffic
16.
A train's distance in each 10 minutes was 27 km, 24 km, 28 km, 20 km. Is its motion uniform? What total distance did it cover?
Section C — Word problems4 × 4 = 16 marks
17.
Describe how to find the time period of a simple pendulum.
18.
A boy cycles 800 m at 10 m/s and then walks 600 m at 5 m/s. (a) How long does each part take? (b) What is the total distance and total time? (c) What is his average speed for the whole trip?
19.
A bus covers 180 km in 6 hours. (a) What is its speed in km/h? (b) In m/s? (c) How far would it go in 7 hours at the same speed?
20.
Two runners run 400 m. Asha takes 50 s and Bina 52 s. (a) Find each speed in m/s. (b) Who is faster? (c) How far behind is Bina when Asha finishes?
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CBSE · Class 7 · Science

Answer key

Measurement of Time and Motion · AW-7S-TMO-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) second—
2(a) 30 m/s570 ÷ 19 = 30
3(c) 342 km/h95 × 18/5 = 342
4(d) 138 km69 × 2 = 138
5(a) 2 hours220 ÷ 110 = 2
6(a) 1.6 s16 ÷ 10 = 1.6
7(c) sand flowing through a narrow neck—
8(c) a car on a straight road at a steady 60 km/h—
9A small heavy bob hung by a thread from a rigid support, free to swing.—
1012 m/s600 ÷ 50
1135 m/s126 × 5/18 = 35
12(a) 240 s (b) 7,200 s4 × 60; 2 × 3600
13720 minutes; 12 h 0 min30 × 24 = 720
1421.67 s; 2.17 s(22 + 22 + 21) ÷ 3; ÷ 10
15(a) uniform (b) non-uniform—
16No, non-uniform; 99 km27 + 24 + 28 + 20
17Tie a bob to a thread about 100 cm long and hang it from a rigid stand. Pull it slightly to one side and release. Time 10 complete oscillations with a stopwatch and divide by 10. Repeat 3–4 times and take the average.—
18(a) 80 s and 120 s (b) 1400 m in 200 s (c) 7 m/s800 ÷ 10; 600 ÷ 5; total distance ÷ total time
19(a) 30 km/h (b) 8.33 m/s (c) 210 km180 ÷ 6; × 5/18; × 7
20(a) Asha 8 m/s; Bina 7.69 m/s (b) Asha (c) About 15.4 m400 ÷ 50; 400 ÷ 52; 400 − Bina's speed × 50