[ In what follows, when writing an answer, if something is not doing a force on the object, write 0.0000 N of force. Positive is up and to the right. Positive sign is not written. Includes the sign - when required. There are no points for wrong answer in sign.] NOTE: This time we use the world average value of -9.81m/s2 for the acceleration of an object in free fall (also -9.81N/Kg). Find the missing values ??of ? in the table in section 6.2 of the text.
Including your address, Fweight = m * (-9.81 N/Kg)
Watch out for the FN sign. Also, be careful if you are calculating the size or magnitude of a force or if you have to include its direction by sign. In this case, for the requested forces, the sign is important. 0.0000 has no sign.
A wooden box with a mass of 10.0000 kg is stationary on a horizontal wooden floor. Nobody touches her. How much force is the force of static friction doing?
Answer N
How much force is the force of kinetic friction doing?
Answer N
Now Myrna pushes her with a force of +10N. The box is still.
How much force is the force of static friction doing?
Answer N
What is the maximum amount of force that the force of static friction could do?
Answer N
How much force is the force of kinetic friction doing?
Answer N
Is Myrna almost about to make the box move? Response
Now Myrna pushes her with a force of +49.04N. The box is still.
How much force is the force of static friction doing?
Answer N
What is the maximum amount of force that the force of static friction could do?
Answer N
How much force is the force of kinetic friction doing?
Answer N
Is Myrna almost about to make the box move? Response
Now the box is sliding in the + direction.
How much force is the force of static friction doing?
Answer N
How much force is the force of kinetic friction doing?
Answer N