A box is pushed across a floor with a force of 50 N. If the coefficient of kinet
Practice Questions
Q1
A box is pushed across a floor with a force of 50 N. If the coefficient of kinetic friction is 0.4, what is the net force acting on the box if the normal force is 100 N?
10 N
20 N
30 N
40 N
Questions & Step-by-Step Solutions
A box is pushed across a floor with a force of 50 N. If the coefficient of kinetic friction is 0.4, what is the net force acting on the box if the normal force is 100 N?
Correct Answer: 10 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 0.4.
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 = 0.4 * 100 N.
Step 6: Calculate the frictional force: Frictional force = 40 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 - 40 N.
Step 9: Calculate the net force: Net force = 10 N.
Friction – Understanding how frictional force opposes motion and is calculated using the coefficient of kinetic friction and the normal force.
Net Force – Calculating the net force by subtracting the frictional force from the applied force.
Normal Force – Recognizing the role of the normal force in determining the frictional force acting on an object.
