Question

(a) Which would require a greater force-accelerating a 2 kg mass at 5 m/ s2 or a 4 kg mass at 2 m/ s2 ?
(b) Write S.I. unit of force.

CBSE Class IX Science SA 2 (3 Marks)

Answer 1

 (a) F₁ = m x a
 = 2 x 5 = 10 N
 F₁ = m x a
 = 4 x 2 = 8 N
 Accelerating a 2 kg mass at 5 m/ s2 will require greater force.
(b) SI unit of Force is N (Newton).