Question 9
The basic unit of speed is:
(i) km/min
(ii) m/min
(iii) km/h
(iv) m/s

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Solution

The answer is (iv).
Speed is defined as the distance covered in unit time. It can be expressed as $S p e e d = \frac{T o t a l d i s t a n c e c o v e r e d}{T o t a l t i m e}$ . So speed can be expressed in all the given units, but basic unit is $\frac{m}{s} .$

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Units of Speed

Standard VII Physics

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Question 9 The basic unit of speed is: (i) km/min (ii) m/min (iii) km/h (iv) m/s

The answer is (iv). Speed is defined as the distance covered in unit time. It can be expressed as Speed=Total distance coveredTotal time. So speed can be expressed in all the given units, but basic unit is ms.

Question 9
The basic unit of speed is:
(i) km/min
(ii) m/min
(iii) km/h
(iv) m/s

The answer is (iv).
Speed is defined as the distance covered in unit time. It can be expressed as $S p e e d = \frac{T o t a l d i s t a n c e c o v e r e d}{T o t a l t i m e}$ . So speed can be expressed in all the given units, but basic unit is $\frac{m}{s} .$