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  1. A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m
  2. A body of mass 120 kg and density 600 kg/m³ floats in water.
  3. The speed of light in media M₁ and M₂ are 1.5×10⁸ ms⁻¹ and 2×10⁸ ms⁻¹ respectively.
  4. A ball is projected upwards from the foot of a tower. The ball crosses the top
  5. The half-life of a radioactive substance is 30 min. The time (in minutes) taken