Question

What force is needed to make a 2 kg firework rocket, to accelerate at 4 m/s2?
A. 0.2 N
B. 2N
C. 4N
D. 8N​

Answer 1

Answer:

8N

Explanation:

F=ma

F=2×4

F=8N

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Answer 2

Answer:

D) 8 N

Explanation:

Given:

• Mass of the rocket (m) = 2 kg
• Acceleration of the rocket (a) = 4 m/s²

To find:

• Force (F)

Solution:

We know that,

${\boxed{\sf{Force(F)=Mass(m)\times\:Acceleration(a)}}}$

• m = 2 kg
• a = 4 m/s²

[Put values ]

$\implies$F = 2×4

$\implies$F = 8

Hence, 8 N force is needed to make a 2kg firework rocket, to accelerate at 4 m/s².

${\boxed{\sf{Option\:(D)\:is\:the\: correct\: answer.}}}$

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Some formulas :-

★ v = u + at

★ s = ut + ½ at²

★ v² = u² + 2as

★ $\sf{s_n=u+\dfrac{1}{2}a(2n-1)}$

★ [ Here, v = Final velocity , u = Initial velocity, a = Acceleration, t = Time, s = Displacement ]