Science Worksheet (Set 10)
Topic: Motion and Time
Grade: VII
Q1. Answer the following questions:
a. What is the time period of the pendulum?
The time period of a pendulum is the time taken to complete one full oscillation. It is measured in seconds (s) and depends on the length of the pendulum and acceleration due to gravity.
b. A bus starts from rest at 2:00 PM. The distances covered by the bus at various intervals of time are recorded as follows:
| Distance (m) | 0 | 5 | 10 | 15 | 20 | 25 |
|---|---|---|---|---|---|---|
| Time (s) | 0 | 2 | 4 | 6 | 8 | 10 |
c. Sonia’s journey: Calculate her speed.
Sonia covered the second part of the journey at a speed of 12 km/h. Her average speed for the entire journey was 9 km/h.
d. A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. What is the total distance covered?
The total distance covered by the car is 25 km.
e. Comment on the working of a sundial used in ancient times.
A sundial works based on the position of the Sun. It has a gnomon that casts a shadow on a marked dial, indicating the time of the day as the Sun moves across the sky.