balanced forces unbalanced forces

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A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to

A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to
  • A. 1 N
  • B. 10N
  • C. -10 N
  • D. None of above
  • Correct Answer: Option B

SI unit of mass is

SI unit of mass is
  • A. gram
  • B. kilogram
  • C. ton
  • D. All of above
  • Correct Answer: Option B