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Solve the following examples: (numerical...

Solve the following examples: (numerical problems)
A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?

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CHETANA PUBLICATION-LAWS OF MOTION-EXAMPLE
  1. The launching of a rocket is based on Newton's third law of motion

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  2. An athlete is running on a circular track. He runs a distance of 400 m...

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  3. Solve the following examples: (numerical problems) A person swims 100...

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  4. Solve the following examples: (numerical problems) An object moves 18...

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  5. An aeroplane taxies on the runway for 30 s with an acceleration of 3.2...

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  6. A kangaroo can jump 2.5 m vertically. What must be the initial velocit...

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  7. A motorboat starts from rest and moves with uniform acceleration, if i...

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  8. The mass of a cannon is 500 kg and it recoils with a speed of 0.25 m//...

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  9. Explain the three different ways to change the velocity

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  10. Explain what is positive, negative and zero acceleration.

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  11. What inference do we draw from the velocity¬ time graph for a uniforml...

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  12. State the three equations of motion and give the relationship explaine...

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  13. Explain recoil and recoil velocity. Derive its expression.

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  14. Complete the flow chart: Newton's laws

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  15. Distinguish between: Distance and Displacement:

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  16. Distinguish between: Uniform motion and non-uniform motion

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  17. Distinguish between: Speed and Velocity:

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  18. Distinguish between Balanced force and Unbalanced force

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  19. Give examples: scalar quantities

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  20. Give examples: Vector quantities

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