physics

3.A force of 26lbs. causes impending motion. If the force is maintained at 26lbs.Fn=Fw=65lbs and the sliding friction is .28.
find:
a.mass of the block
b.FF
c.acceleration
What force must be maintained to cause an acceleration of 2ft/s^2?

  1. 👍
  2. 👎
  3. 👁
  1. <<and the sliding friction is .28.
    >>
    You need to be more precise defining the problem. Do you mean the coefficient of sliding friction is 0.28? What does FF stand for?

    a) If the surface is level, Fn = Fw is the weight. The mass is Fn = Fn/g. g = 32.2 ft/s^2 and the mass will be in slugs.
    b) The friction force (FF?) is (0.28) x (weight)
    c) acceleration = (Applied force - Friction force) / mass

    Use F = ma to get the net force required for a = 2 ft/s^2.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science-Enr. Phys.

    A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted downward at an angle of 35.2 degrees below the horizontal. Fink Mu,k between the box and the floor.

  2. Physics

    A car is driven at a constant speed of 21 m/s (76km/h) down a road. The car's engine delivers 52 kW of power. Calculate the average force of friction that is resisting the motion of the car. My thinking: Convert 52 kW to 5200 W.

  3. Physics

    A large crate filled with physics laboratory equipment must be moved up an incline onto a truck. 1. The crate is at rest on the incline. What can you say about the force of friction acting on the crate? a. The friction force point

  4. science

    What is the magnitude of a force?(1 point) A the type of force B the amount of force C the direction of the force D the motion of the force

  1. Science

    What is a newton?(1 point) -a force that changes the motion of an object -a force that pulls objects toward the ground -the unit in which force is measured -a non-contact force

  2. science

    1. What is the magnitude of a force? the motion of the force the motion of the force A. the motion of the force B. the amount of force C. the type of force D. the direction of the force 2. Two people push a box from opposite

  3. Science

    FORCES THAT CHANGE MOTION QUICK CHECK 1.What is a newton? ANSWER: The unit in which force is measured 2.A tennis player swings and hits the ball away. How does the force of the tennis racket affect the motion of the ball? ANSWER:

  4. physics

    A horizontal force of 200 N is applied to a 55 kg cart across a 10 m level surface. If the cart accelerates at 2 m/s^2 then what is the work done by the force of friction as it acts to retard the motion of the cart? Hint calculate

  1. physics

    A 95kg box initially at rest on a horizonal floor requires a 650N horizontal force to set it in motion. After the box is in motion, a horizontal force of 560N keeps it moving at a constant velocity. Determine uS and uK the clock

  2. physics

    because of friction, a constant force of 20 N is needed to slide a box across a room to the right at a constant speed, and box is moved 3 m. What is the friction force and how much work is done by friction force?? How much work is

  3. Physics

    In physics, work is defined as the product of the A) net force and the distance traveled B) net force parallel to the motion and direction traveled C) net force parallel to the motion and the time it is applied

  4. Science

    When a nonzero net force acts on an object the force A.changes the motion of the object B.Must be greater than the reaction force C.Does not change the motion of the object D.is equal to the weight of the object

You can view more similar questions or ask a new question.