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# A Body of Mass 2 Kg is at Rest. What Should Be the Magnitude of Force Which Will Make the Body Move with a Speed of 30 M/S at the End of 1 S ? - CBSE Class 9 - Science

ConceptConservation of Momentum

#### Question

A body of mass 2 kg is at rest. What should be the magnitude of force which will make the body move with a speed of 30 m/s at the end of 1 s ?

#### Solution

The body gains speed 30 m/s in 1 s. So, the acceleration is,
a = 30/1 = 30 m/s2
Mass, m = 2 kg
Force = mass × acceleration
Force = m × a
= 2 × 30 = 60
The magnitude of force = 60 N

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#### APPEARS IN

Lakhmir Singh Solution for Science for Class 9 Part 1 Physics (2016 to Current)
Chapter 2: Force and Laws of Motion
Short Answers | Q: 27 | Page no. 75

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Solution A Body of Mass 2 Kg is at Rest. What Should Be the Magnitude of Force Which Will Make the Body Move with a Speed of 30 M/S at the End of 1 S ? Concept: Conservation of Momentum.
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