extra numericals for chapter motion for class 7
Answers
For class 7 which subject physics math for which subjects you want
Answer:
1. A spaceship travels 36000 km in one hour. Express its speed in km/s.
2. Last Sunday, Priyanka decided to go outside with her family for the dinner in some particular restaurant.
Then, she thought to go through her own car. So, while moving she increased the speed of the car from 36 km/h to 54 km/h. All of sudden, a rickshaw came in front of her car but due to applying of brakes at the right time, both of them got safe from meeting with an accident.
(a) Calculate the increase in the speed of the car in the terms of m/s.
(b) Mention a positive action performed by Priyanka here.
3. The average age of children of class VII is 12 years and 3 months. Express this age in second.
4. Plot a distance-time graph of the tip of the second hand of a clock by selecting 4 points on X-axis and /-axis, respectively. The circumference of the circle traced by the second hand is 64 cm.
5. Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 O’ clock. He started his journey from his home at 6 O’ clock on his bicycle and covered a distance of 6 km in 40 min. At that point, he met Chintu and he spoke to him for 5 min and reached Golu’s birthday party at 7 O’ clock. With what speed, did he cover the second part of the journey? Calculate-his average speed for the entire journey.
6. Calculate Time-period of a simple pendulum if it takes 72 seconds to complete 24 oscillations.
7. A train is travelling at a speed of 100 km/hr. How long will it take to complete a journey of 500 km without stopping in between.
8.Ramesh takes 15 minutes to reach market from his house on this cycle. If the speed of his cycle is 4 m/s calculate the distance between his house and market?
Step-by-step explanation:
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