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Copy and answer in your Science Lecture Notebook. Write the correct formula and it’s unit/s.
Show ALL your SOLUTIONS.
1. Ron walks 22.5 km in 5 hours, find his speed.
2. A car covers a distance of 600 m in 2 minutes whereas a train covers a distance of 75 km in 50 minutes. Find the ratio of their speed.
3. A bus covers a certain distance in 60 minutes if it runs at a speed of 60 km/hr. What must be the speed of the bus in order to reduce the time of journey by 40 minutes?
4. Find out the distance covered when, speed is 960 km/hour and time is 1 hour 50 minutes.
5. A cyclist covers 950 m in 5 minutes. Find his speed in km/ hour.
6. The speed of the train is 72 km per hour. Find its speed in meter per second.
7. A man runs at the speed of 10 km/hr. How much time will he take to cover 750 meters?
8. A cyclist travels at a speed of 20 km/hour. How far will he travels in 50 minutes?
9. An athlete runs a 200-metrer dash in 10 seconds. What is the average velocity during the run?
10. What is the velocity of a jeep that travels of 250 kilometers in 10 hours?
11. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
12. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration?
Answers & Comments
Answer:
The S.I unit of speed is metre/second or metre per second i.e m\ s^{-1