Physics
posted by miss sixty .
A child pushes a toy box 4.0m along the floor with a force of 6.00N directed downward at an angle of 37.0 degrees to the horizontal.
a. How much work does the child do?
b. Would you expect more or less work to be done if the child pulled upward at the same angle?
a) The work done is the horizontal component of the Force, 6.00 cos 37, multipled by the distance the box moves, 4.0 m.
b) By pulling upwards at 37 degrees with force F, there will be a reduction in the force that the box applies to the floor (which is weight  F sin 37) , and a reduction of the friction force. Less force and less work will be required to move the box at constant speed.
Respond to this Question
Similar Questions

Physics
A child pushes a toy box 4.0 m along the floor with a force of 6.00 N directed downward at an angle 37.0 degrees to the horizontal. (a)How much work does the child do? 
physics
A child pushes a toy box 4.0m along the fllor with a force of 6.00N directed downward at an angle of 37.0 degrees to the horizontal. a. How much work does the child do? 
Physics
A child pushes a toy box 4.0m along the floor with the force of 6.00 N directed downward at an angle 37 degrees to the horizontal. a. How much work does the child do? 
physics
Carol and Bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle of 40.0 downward from the horizontal. Bruno pulls the box from the other side with a force of 11.0 N at … 
physics repost
Carol and Bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle of 40.0 downward from the horizontal. Bruno pulls the box from the other side with a force of 11.0 N at … 
physics
carol and bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle of 40.0 downward from the horizontal. Bruno pulls the box from the other side with a force of 11.0 N at … 
Physics
Dirk pushes on a packing box with a horizontal force of 67.0 N as he slides it along the floor. The average friction force acting on the box is 5.10 N. How much total work is done on the box in moving it 2.20 m along the floor? 
physics
Dirk pushes on a packing box with a horizontal force of 67.0 N as he slides it along the floor. The average friction force acting on the box is 3.00 N. How much total work is done on the box in moving it 3.10 m along the floor? 
Physics
A factory worker pushes a 29.2kg crate a distance of 4.1m along a level floor at constant velocity by pushing downward at an angle of 28 degrees below the horizontal. The coefficient of kinetic friction between the crate and floor … 
Physics
A mover pushes a 60 lb box 30 ft along a level floor at constant speed with a force directed 45 degrees below the horizontal. If the coefficient of kinetic friction is 0.20, how much work does the mover do on the box?