Forces and velocities of a box

In summary, a 12-kg box slides at a speed of 10m/s across a smooth level floor and enters a rough portion that is 3 m in length. In the rough portion, the box experiences a horizontal frictional force of 72N. To determine the work done by the frictional force, we can use the formula W=(F)(d). However, we do not have enough information to solve for the velocity of the box when it leaves the rough surface or the length of rough surface required to completely bring the box to rest.
  • #1
odie
4
0
a box of mass 12-kg slides at a speed of 10m/s across a smooth level floor, where it enters a rough portion 3 m in length. in the rough portion, the box experiences a horizontal frictional force of 72N.

a) How much work is done by the frictional force?
b) what is the velocity of the box when it leaves the rough surface?
c) what length of rough surface brings the box completely to rest?

thats all, don't ask for more cause there is nothing more to add
 
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  • #2
What did you try?
 
  • #3
well i found out that we have to use W=(F)(d) (still not sure)
but i have no ideas in how to solve b) and c)
 

1. What is the difference between force and velocity?

Force is a measure of the push or pull on an object, while velocity is a measure of the speed and direction of an object's motion.

2. How are forces and velocities related?

Forces can cause changes in an object's velocity, such as speeding up, slowing down, or changing direction. In turn, an object's velocity can determine the amount of force needed to move it.

3. How do you calculate the net force on a box?

The net force on a box can be calculated by adding up all the individual forces acting on the box, taking into account their direction and magnitude.

4. What factors affect the force and velocity of a box?

The force and velocity of a box can be affected by factors such as the mass of the box, the applied force, and the surface it is moving on. Other factors, such as friction and air resistance, can also play a role in determining the force and velocity.

5. How can you change the velocity of a box?

The velocity of a box can be changed by applying a force in the direction of motion or by changing the direction of the applied force. Increasing or decreasing the force applied can also impact the box's velocity.

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