A boy intend to move an mkg crate across the floor by applying a constant force p newton on it.the coeficient of friction between the floor and crate is ü.which of these is the best option for his task?
A rope suspended from a ceiling supports an object of weight W at its opposite end. Another rope tied to the first at the middle is pulled horizontally with a force of 30N.the junction P of the rope is in equilibrum. Calculate the weight W and the tens.
To determine the best option for the boy's task, we need to consider the forces acting on the crate when he applies a constant force to move it. The main force to overcome is the force of friction between the crate and the floor.
The force of friction can be calculated using the equation:
Frictional force = Coefficient of friction * Normal force
The normal force is the force exerted by the floor on the crate, which is equal to the weight of the crate.
Therefore, to determine the best option, we consider the following:
1. The force the boy applies, p, should be greater than or equal to the force of friction to move the crate.
- If p < Frictional force, then the crate will not move.
- If p = Frictional force, then the crate will move at a constant speed.
- If p > Frictional force, then the crate will accelerate.
2. The coefficient of friction, μ, affects the magnitude of the frictional force.
- A lower coefficient of friction will result in a lower frictional force, making it easier to move the crate.
- A higher coefficient of friction will result in a higher frictional force, making it more difficult to move the crate.
Therefore, the best option for the boy's task is to apply a force, p, greater than the force of friction, which depends on the coefficient of friction, μ, and the weight of the crate.