Question

$\huge \bigstar \mathfrak \purple {do \: it \: fast \: to \: be \: brainliest \: + \: 10 \: thanks}$
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Answer 1

Answer:

1.In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity. 

2.SI unit: m/s, m s−1

3.1 km = 1000 m and 1 hr = 3600 sec (60 min x 60 sec each). When converting km/hr to m/sec, multiply the speed with 1000 and divide the result with 3600. When Converting m/sec to km/hr, divide the speed with 1000 and multiply the result with 3600.

1 km = 1000 m; 1 hr = 3600 sec.

To convert km/hr into m/sec, multiply the number by 5 and then divide it by 18.

4.When an object covers equal distance in equal time interval is called uniform motion.

1.Distance = speed * time = 60×30 = 180km

2.Time taken =15min

Speed =2m/min

Distance = speed × time=2×15=30m

Distance between Salma's school and her house is 30m.