A 5 kg block is resting on a horizontal surface. What is the normal force acting
Practice Questions
Q1
A 5 kg block is resting on a horizontal surface. What is the normal force acting on the block?
5 N
10 N
15 N
20 N
Questions & Step-by-Step Solutions
A 5 kg block is resting on a horizontal surface. What is the normal force acting on the block?
Correct Answer: 49 N
Step 1: Identify the mass of the block, which is given as 5 kg.
Step 2: Understand that the normal force is the force that supports the weight of the block on a surface.
Step 3: Recall the formula to calculate weight, which is weight = mass × gravity.
Step 4: Use the value of gravity, which is approximately 9.8 m/s².
Step 5: Calculate the weight of the block: 5 kg × 9.8 m/s² = 49 N.
Step 6: Conclude that the normal force acting on the block is equal to its weight, which is 49 N.
Normal Force – The force exerted by a surface to support the weight of an object resting on it, equal in magnitude and opposite in direction to the weight of the object when on a horizontal surface.
Weight Calculation – The weight of an object is calculated using the formula: weight = mass × gravity.
