Railway Science (Physics-Force and Pressure) (Part-V)Total Questions: 2321. If a force of 20N is applied on a body with a mass of 10kg, what will be the acceleration produced? [RRB ALP Tier - I (29/08/2018) Morning](a) 200m/sec²(b) 2m/sec²(c) 100m/sec²(d) 5m/sec²Correct Answer: (b) 2m/sec²Solution:Force = Mass × Acceleration = m × a Force has magnitude as well as direction. It is a vector quantity. Force = 20 N , Mass= 10 kg Acceleration = ? 20 = 10 × a ⇒ a = 2 m/sec²22. When a force of 10 N acts on a body of mass of 10 kg that is able to move freely, which of the following statements will apply? [RRB ALP Tier - I (29/08/2018) Evening](a) The body moves with an acceleration of 1 ms⁻²(b) The body moves with a speed of 1 m/s(c) The body moves with a speed of 1 km/s(d) The body moves with an acceleration of 10 𝑚𝑠⁻²Correct Answer: (a) The body moves with an acceleration of 1 ms⁻²Solution:Newton's Second law, Force (F) = Mass (m) × acceleration The force acting on the body (F) = 10 N, Mass of the body (m) = 10 kg, Acceleration of the body (a) = ? F = ma ⇒ a = 𝐹/m ,a = 10/10 = 1 m/s².23. A wooden block of mass m₁ kg accelerates at 10 ms⁻² when a force of 5 N acts on it. Another block of mass m₂ kg accelerates at 20 ms⁻² when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about: [RRB ALP Tier - I (30/08/2018) Morning](a) 4.67 ms⁻²(b) 6.67 ms⁻²(c) 1.67 ms⁻²(d) 5.67 ms⁻²Correct Answer: (b) 6.67 ms⁻²Solution:Submit Quiz« Previous123
