physics

A 300lb car is moving at constant velocity onn a level concrete road. How much force is needed to keep it moving if the u=0.04

  1. 👍
  2. 👎
  3. 👁
  1. M = 300Lbs * 0.454kg/Lb = 136.2 kg.

    Fk = u*Fn = u*Mg = 0.04 * (136.2*9.8) = 53.4 N. = Force of kinetic friction.

    Fap-Fk = M*a.
    Fap-53.4 = M*0 = 0, Fap = 53.4 N. = Force applied.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    During a road test,a driver brakes a 1420kg car moving at 64.8km/h [W]. The car slows down and comes to a stop after moving 729m [W]. What is the net force acting on the car?

  2. Physics

    A 1200 kg car pulls an 820 kg trailer over a rough road. The force of friction acting on the trailer is 650 N [backwards]. Calculate the force that the car exerts on the trailer if (a) the trailer is moving at a constant velocity

  3. Physics

    A tow truck pulls a car from rest onto a level road. The tow truck exerts a horizontal force of 1500 N on the car. The frictional force on the car is 810 N. Calculate the work done by each of the following forces on the car as the

  4. physics

    A 1200-kg car is being driven up a 5.0degrees hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f=524N. A force F is applied to the car by the road and propelsthe car forward. In

  1. Physics

    A car is driving on a level highway. It is acted upon by the following forces: a downward gravitational force of 12 kN, an upward contact force due to the road of 12 kN, another contact force due to the road of 7 kN directed West,

  2. physics

    Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they

  3. Physics

    The coefficient of kinetic friction between a rubber tire and a dry concrete road is 0.700. What is the distance in which a car skid to a stop on such a road if its brakes are locked when it is moving at 60 km/h?

  4. Physics

    A 600kg car is moving on a level road at 30m/s.how large is a retarding force is required to stop it in a distance of 70m

  1. physics.

    A car travels forward with constant velocity. It goes over a small stone, which gets stuck in the groove of a tire. The initial acceleration of the stone, as it leaves the surface of the road is, a)vertically up b)horizontally

  2. algebra

    two car A and B are moving along a straight road in the same direction with velocities of 25km/h and 40km/h , respectively Find the velocity of car B relative to car A.

  3. physics

    Unit 2: Kinematics in 1-D Exam Preparation 1. A bike first accelerates from 0.0 m/s to 5.0m/s in4.5 s, then continues at this constant speed for another 4.5 s What is the total distance traveled by the bike? A car traveling at 20

  4. 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.

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