A force 2F acting on a particle of mass 10 kg produces an acceleration of 30 m/s2. A force 5F acting on a particle of mass M produces and acceleration are 25 m/s2. What is the mass M?
Correct answer: A. 30 kg
- A. 30 kg
- B. 21 kg
- C. 4.8 kg
- D. 3.3 kg
Explanation
Given that; F1 = 2F m1 = 10kg a1= 30m/s^2 F2 = 5F m2 =M a2 = 25 m/s^2 F1 = m1a1 2F = 10 × 30 F = 300/2 F = 150 F2 = m2a2 5(150) = M × 25 750/25 = M M = 30kg. Hence, option A is correct.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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