A 5 kg object is at rest on a surface. If a horizontal force of 15 N is applied,

Practice Questions

Q1
A 5 kg object is at rest on a surface. If a horizontal force of 15 N is applied, what is the object's acceleration? (Assume friction is negligible)
  1. 2 m/s²
  2. 3 m/s²
  3. 4 m/s²
  4. 5 m/s²

Questions & Step-by-Step Solutions

A 5 kg object is at rest on a surface. If a horizontal force of 15 N is applied, what is the object's acceleration? (Assume friction is negligible)
Correct Answer: 3 m/s²
  • Step 1: Identify the mass of the object. The mass is given as 5 kg.
  • Step 2: Identify the force applied to the object. The force is given as 15 N.
  • Step 3: Recall the formula for acceleration, which is a = F/m, where 'a' is acceleration, 'F' is force, and 'm' is mass.
  • Step 4: Substitute the values into the formula. Here, F = 15 N and m = 5 kg.
  • Step 5: Calculate the acceleration: a = 15 N / 5 kg.
  • Step 6: Perform the division: 15 divided by 5 equals 3.
  • Step 7: Conclude that the object's acceleration is 3 m/s².
  • 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.
  • Force and Acceleration Relationship – Understanding how to calculate acceleration using the formula a = F/m, where F is the net force and m is the mass.
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