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)
2 m/s²
3 m/s²
4 m/s²
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.