A 1400-N crate rests on the floor.     Part A How much work is required to move it at constant speed 5.0 m along the floor against a friction force of 310 N. Express your answer to two significant figures and include the appropriate units.

A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules?  b. What is the work done by friction, in joules?  c. What is the work done by gravity, in joules?  d. What is the net work, in joules?

Part A How much work must you do to push a 13 kg block of steel across a steel table at a steady speed of 1.3 m/s for 5.4 s? The coefficient of kinetic friction for steel on steel is 0.60. Express your answer in joules. %3D push = J Submit Request Answer Part B What is your power output while doing so? Express your answer in watts. ΑΣφ P = W %3D Submit Request Answer Next >

The dragster accelerates from rest down a road of length d = 400.0 m. In the absence of any friction the dragster has a constant acceleration of a = 21.1 m/s2 in the direction of motion, and its mass is m = 1175 kg. Assume the dragster is moving in the positive horizontal direction. a.  Assuming there is no rolling friction, write an expression for the amount of net work done on the dragster, Wd, during the run, in terms of the given quantities.  b.consider the existence of rolling friction, which causes a total resistive force with magnitude Fr on the dragster. Write an expression for the work done by this force over a distance d.  c. What is an expression for the total kinetic energy of the dragster, Ed, in the presence of rolling friction after it travels a distance d.  d. What is the dragster's final speed, in meters per second, assuming Fr = 1000 N?