A 15 kg object is at rest on a horizontal surface. What is the normal force acti
Practice Questions
Q1
A 15 kg object is at rest on a horizontal surface. What is the normal force acting on it?
0 N
15 N
150 N
75 N
Questions & Step-by-Step Solutions
A 15 kg object is at rest on a horizontal surface. What is the normal force acting on it?
Correct Answer: 150 N
Step 1: Identify the mass of the object. The mass is given as 15 kg.
Step 2: Understand that the object is at rest on a horizontal surface, which means the normal force is equal to the weight of the object.
Step 3: Calculate the weight of the object using the formula: weight = mass * gravity.
Step 4: Use the value of gravity, which is approximately 10 m/s².
Step 5: Plug in the values: weight = 15 kg * 10 m/s².
Step 6: Perform the multiplication: 15 * 10 = 150.
Step 7: Conclude that the normal force acting on the object is 150 N.
Normal Force – The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.
Weight Calculation – Weight is calculated using the formula weight = mass × gravitational acceleration (w = mg).
