Motion and Time quiz

The SI unit of speed is:

Speed is equal to:

The basic unit of time is the:

A device that measures the distance travelled by a vehicle is the:

The motion of a pendulum is:

A car moving at constant speed on a straight road shows:

72 km/h is equal to:

The distance-time graph of uniform motion is a:

A pendulum makes 10 oscillations in 20 s. Its time period is:

Which ancient device used the shadow of a stick to tell time?

A bus travels 90 km in 2 hours. Find its speed. (2 marks)

Why is the motion of a car in city traffic non-uniform? (2 marks)

How is a pendulum used in clocks? (2 marks)

Convert 5 m/s into km/h. (2 marks)

Name two quartz-based devices that measure time. (2 marks)

What does the slope of a distance-time graph tell us? (2 marks)

Name two larger units of time and how they relate to the second. (2 marks)

Why is the time period of a pendulum found by timing 20 oscillations? (2 marks)

A runner covers 400 m in 50 s. Find his speed. (2 marks)

What is the difference between the readings of a speedometer and an odometer? (2 marks)

A train is moving at 90 km/h. Find (i) its speed in m/s (ii) the distance covered in 20 minutes in km. (3 marks)

A simple pendulum takes 32 s to complete 20 oscillations. Find its time period and the number of oscillations in 1 minute 20 seconds. (3 marks)

The distance between two stations is 240 km. A train covers it in 4 hours. Find its speed. How long would it take at 80 km/h? (3 marks)

Show the following on a distance-time table and find the speed: a cyclist covers 0 m at 0 s, 100 m at 20 s, 200 m at 40 s and 300 m at 60 s. Is the motion uniform? (3 marks)

Ravi walks 1.2 km to school in 20 minutes and returns by bus in 5 minutes. Find his walking speed and bus speed in km/h. (3 marks)

Read the passage and answer the questions. Mr Sharma drove from Delhi to Agra, 210 km away. He started at 7:00 am and reached at 10:30 am, stopping for tea for 30 minutes on the way. (i) Find the total time of the journey. (ii) Find the actual driving time. (iii) Find his average speed while driving. (5 marks)

Read the passage and answer the questions. In a school race, Asha ran 100 m in 16 s, Bina in 20 s and Chitra in 12.5 s. (i) Who won the race? (ii) Find Chitra's speed. (iii) Find Bina's speed. (5 marks)

Read the passage and answer the questions. Long ago, people used the shadow of a stick to measure time, and sand flowing from one bulb to another to measure intervals. (i) Name the two devices. (ii) Why did the sundial not work at night? (iii) Name one modern time-keeping device. (5 marks)

Read the passage and answer the questions. A girl on a swing moves back and forth. Her friend notes that she completes 10 swings in 25 s. (i) What type of motion is this? (ii) Find the time period. (iii) How many swings will she complete in 1 minute? (5 marks)

Read the passage and answer the questions. A car's speedometer showed 60 km/h steadily on a highway, but in the city it kept changing between 0 and 40 km/h. (i) Which part of the trip was uniform motion? (ii) What does the speedometer measure? (iii) How far would the car travel in 15 minutes on the highway? (5 marks)

Describe an activity to find the time period of a simple pendulum. Draw the set-up and explain how to record the readings. (6 marks)

Draw a distance-time graph for a car: time (h) 0, 1, 2, 3, 4; distance (km) 0, 40, 80, 120, 160. Find its speed and explain the shape of the graph. (6 marks)

Explain uniform and non-uniform motion with two examples each and draw distance-time graphs for both. (6 marks)

Describe how time was measured in ancient times using a sundial, water clock and sand clock. Draw any one. (6 marks)

A bus travels from A to B, 60 km, at 30 km/h and returns at 60 km/h. Find the time for each trip, the total time and the average speed for the whole journey. Draw a rough distance-time graph. (6 marks)