A 12 kg object is at rest. A force of 36 N is applied to it. What will be its ve

Practice Questions

Q1
A 12 kg object is at rest. A force of 36 N is applied to it. What will be its velocity after 3 seconds? (2020)
  1. 1 m/s
  2. 2 m/s
  3. 3 m/s
  4. 4 m/s

Questions & Step-by-Step Solutions

A 12 kg object is at rest. A force of 36 N is applied to it. What will be its velocity after 3 seconds? (2020)
  • Step 1: Identify the mass of the object, which is 12 kg.
  • Step 2: Identify the force applied to the object, which is 36 N.
  • Step 3: Use the formula for acceleration, which is Acceleration = Force / Mass.
  • Step 4: Plug in the values: Acceleration = 36 N / 12 kg.
  • Step 5: Calculate the acceleration: 36 N / 12 kg = 3 m/s².
  • Step 6: Identify the initial velocity of the object, which is 0 m/s (since it is at rest).
  • Step 7: Use the formula for velocity after a certain time, which is Velocity = Initial velocity + (Acceleration × Time).
  • Step 8: Plug in the values: Velocity = 0 m/s + (3 m/s² × 3 s).
  • Step 9: Calculate the velocity: 0 m/s + 9 m/s = 9 m/s.
  • Newton's Second Law of Motion – This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
  • Kinematics – This involves the equations of motion that relate displacement, velocity, acceleration, and time.
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