A Particle Decelerates Uniformly from a Speed of 30 Cm/s

question 54

Multiple Choice

A particle decelerates uniformly from a speed of 30 cm/s to rest in a time interval of 5.0 s.It then has a uniform acceleration of 10 cm/s² for another 5.0 s.The particle moves in the same direction along a straight line.The average speed over the whole time interval is

• A)20 cm/s
• B)35 cm/s
• C)38 cm/s
• D)100 cm/s
• E)12 cm/s

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