What is the horizontal force required to move a crate?

If the coefficient of kinetic friction between a 12.0 kg crate and the floor is .30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if the force of friction is zero?

Solution Preview

Newton's first law states that the total force applied to a body must be zero if the body is at rest or moving with constant velocity.

In this case we have to apply this law in both vertical and horizontal directions.

The forces applied on the obect are ...

Solution Summary

In the first case, the solution is found by applying Newton's first law in both vertical and horizontal directions.

... This is termed as resolving the forces). ... So, pushing a body by applying a force `F' at an angle `Ø ... body of weight W + (F Sin Ø), with a horizontal force F Cos ...

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... the reaction forces to all the forces on the ... as a system, as there is no external force the momentum ... Hence the total horizontal distance covered by the second ...

... Two forces can be resolved into components as shown in the ... so long as it is being forced to move... Net horizontal force on the crate = 330cos21O 195 = 113 N. ...

... with initial velocity of magnitude vO and at an angle theta above the horizontal. ... much work is required to stretch a spring 25.2 cm if its force constant is ...

... c. Find the magnitudes of the contact forces between the blocks. 15. A 4.1-kg box is pushed along a horizontal floor by a force of magnitude 21 N at an ...

... is not equal to the product the horizontal displacement and ... F cos θ will be the force responsible for ... the block has to stay there, the required force will be ...

... with a speed of 12 m/s approaches a horizontal spring ... Here is the forces diagram: For the crate not to slide ... θ ) fs ≥1 mg sin (θ ) The friction force is: fs ...