A box is pushed with a force of 50 N on a surface with a coefficient of kinetic
Practice Questions
Q1
A box is pushed with a force of 50 N on a surface with a coefficient of kinetic friction of 0.3. If the normal force is 100 N, what is the net force acting on the box?
20 N
30 N
50 N
70 N
Questions & Step-by-Step Solutions
A box is pushed with a force of 50 N on a surface with a coefficient of kinetic friction of 0.3. If the normal force is 100 N, what is the net force acting on the box?
Correct Answer: 20 N
Step 1: Identify the applied force on the box, which is given as 50 N.
Step 2: Identify the coefficient of kinetic friction, which is given as 0.3.
Step 3: Identify the normal force acting on the box, which is given as 100 N.
Step 4: Calculate the frictional force using the formula: Frictional force = μk * N.
Step 5: Substitute the values into the formula: Frictional force = 0.3 * 100 N.
Step 6: Calculate the frictional force: Frictional force = 30 N.
Step 7: Calculate the net force acting on the box using the formula: Net force = applied force - frictional force.
Step 8: Substitute the values into the formula: Net force = 50 N - 30 N.
Step 9: Calculate the net force: Net force = 20 N.
Newton's Second Law – Understanding the relationship between force, mass, and acceleration, particularly how net force is calculated.
Friction – Calculating the frictional force using the coefficient of kinetic friction and the normal force.
Net Force – Determining the net force by subtracting the frictional force from the applied force.
