Define the following terms.
Standard units, Measurement, Speed, Uniform motion, Non-uniform motion
Calculate the speed.
1. Distance between your home and School is 22 kilometers. If your bus takes 40 minutes to reach the school, calculate the speed of the bus.
2. The Rajdhani Express takes 10 hours to reach New Delhi from Ahmedabad (930 km). Find out the speed of the train.
3. A snail travels 0.5 kilometer in 3 hours. How fast is the snail travelling?
Observe the following graphs and answer the questions that follow.
Graph 1 Graph 2
1. Which graph shows more distance travelled in the given time? ……………………
2. Which one is showing uniform motion? ……………………
3. In graph 1, how much distance is travelled in 15 minutes? ……………………
4. During 15 to 35 minutes, how much distance is travelled in graph 1? ……………
5. During 40 to 60 minutes, how much distance is travelled in graph 2? ……………
Differentiate between uniform and non-uniform motion.
Describe a simple pendulum with a diagram. What kind of motion does it show?
For a simple pendulum; define:- a) One oscillation b) Time period c) Frequency
Q 1. A simple pendulum takes 45 seconds to complete 30 Oscillation. What is the Time period of the Pendulum?
Q 2. If distance covered by a car is 120 Km. in 60 minutes. What should be the minimum speed in km/ hr. of the car?
Q3. Which clocks are more accurate to measure time in daily life?
Q4. Speed is equal to _________.
Q5. Identify type of motion in the wheel of the cycle.
Q6. A car moves with the speed of 30 km/h for 30 minutes and then with the speed of 4o km/h for 15 minutes. Calculate the total distance covered (show calculation).
Q7. An object repeats its motion after certain interval of time is called _______________.
Q8. The time taken by a _____________ for _______is known as its Time Period.
Q9. A body is said to be in Uniform motion when it travels______________ and covers___________ in ___________of time.
Q10. A typical distance time graph for uniform Motion is a ______________line.
Answers
Answer:
The standard (metric) units that are in use commonly include:
Weight : grams and kilograms
Length of Distance : centimetres, metres and kilometres
Fluid Mass Measurements : millilitres and litres
Temperature : kelvin although fahrenheit and celsius are used for everyday temperatures
Time : seconds, minutes and hour
Electric Current : ampere and kiloampere
Amount of Substance : mole and kilomoles
Answer:
The standard (metric) units that are in use commonly include:
Weight : grams and kilograms
Length of Distance : centimetres, metres and kilometres
Fluid Mass Measurements: millilitres and litres
Temperature: kelvin although fahrenheit and celsius are used for everyday temperatures
Time : seconds, minutes and hour
Electric Current : ampere and kiloampere
Amount of Substance : mole and kilomoles
Explanation: