Question

The two crates are released from rest. Their masses are ma = 40 kg and mp = 30 kg, and the coefficient of kinetic fric- tion between crate A and the inclined surface is pk = 0.15. What is the magnitude of the velocity of the crates after 1 s? 20°

Answer 1

To find the magnitude of the velocity of the crates after 1 second, we can use the equations of motion and the concept of friction.

Step-by-step explanation:

The magnitude of the velocity of the crates after 1 second can be determined using the equations of motion and the concept of friction.

The force of friction can be calculated using the formula:

Frictional force = coefficient of kinetic friction * Normal force

After determining the frictional force, we can calculate the net force acting on the crates by subtracting the frictional force from the force due to gravity.

Using Newton's second law, we can then find the acceleration of the crates.

Finally, we can use the equation of motion:

Velocity = Initial velocity + (Acceleration * Time)

Substituting the values given in the question, we can find the magnitude of the velocity.