Question

1. A car accelerates uniformly from rest to attain a speed of 20 m/s after covering a distance of 80 m. It then decelerates uniformly and comes to rest after covering further a distance of 160 m. The total time taken for this journey is (1) 8 s (2) 16 s (3) 24 s (4) 12 s
2. A ball thrown up vertically returns to the thrower after 8 s. Its height above the ground after 6 s, will be [Take g = 10 m/s2] (1) 20 m (2) 40 m (3) 60 m (4) 80 m

Answer 1

1.) 8s
2.) 60m

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