A block of mass 5 kg is resting on a horizontal surface. If the coefficient of s
Practice Questions
Q1
A block of mass 5 kg is resting on a horizontal surface. If the coefficient of static friction is 0.4, what is the maximum static frictional force acting on the block?
10 N
20 N
15 N
25 N
Questions & Step-by-Step Solutions
A block of mass 5 kg is resting on a horizontal surface. If the coefficient of static friction is 0.4, what is the maximum static frictional force acting on the block?
Step 1: Identify the mass of the block, which is given as 5 kg.
Step 2: Identify the coefficient of static friction, which is given as 0.4.
Step 3: Calculate the weight of the block (N), which is the force due to gravity. Use the formula: N = mass * gravity. Here, gravity is approximately 10 m/s².
Step 4: Calculate the weight: N = 5 kg * 10 m/s² = 50 N.
Step 5: Use the formula for maximum static frictional force: Fs = μs * N.
Step 6: Substitute the values into the formula: Fs = 0.4 * 50 N.
Step 7: Calculate the maximum static frictional force: Fs = 20 N.
Static Friction – The force that resists the initiation of sliding motion between two surfaces in contact.
Normal Force – The perpendicular force exerted by a surface on an object resting on it, equal to the weight of the object in this case.
Coefficient of Static Friction – A dimensionless value that represents the ratio of the maximum static frictional force to the normal force.
