Question

9. Which of the following statements is correct?
a. The basic unit of time is second.
b.Every object's motion is uniform.
c. Two cars move for 5 minutes and 2 minutes respectively. The second car is faster
because it takes less time for the same distance.
d. The speed of a car is expressed in km/h.,
SCIENCE 7
35
WORK BOOK​

Answer 1

Answer:

a). The basic unit of time is second.

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Answer 2

Answer:

Answer. As per SI, The Standard unit of time is second. And Hours, Minutes are practical units of time. This statement is wrong because, A body is said to be in Uniform motion if it covers equal distances in equal intervals of time, however small or large the intervals of time may be.