A sledge loaded with bricks has a total mass of 18.0 kg and it pulled at constant speed by a rope inclined at 20.0° above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. The confident of kinetic friction between the sledge and surface it 0.500. (a) What is the tension in the rope? (b) How much work is done by the rope on the sledge? (c) What is the mechanical energy lost due to friction?

An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 5.3x 104 kg, and the force causes its speed to change from 6900 to 5500m/s. (a) What is the work done by the force? (b) If the asteroid slows down over a distance of 2.3x 10 m determine the magnitude of the force. (a) Work- (b) F- i

A block with a mass of 39.5 kg is pushed with a horizontal force of 150 N. The block moves at a constant speed across a level, rough plane a distance of 5.95 m. (a) What is the work done (in J) by the 150 N force?   (b) What is the coefficient of kinetic friction between the block and the plane?

A box with a mass of 46.0 kg is pushed with a horizontal force of 150 N. The box moves at a constant speed across a level, rough floor a distance of 5.55 m. (a) What is the work done (in J) by the 150 N force? J (b) What is the coefficient of kinetic friction between the box and the floor?

A 60 Nt force is exerted on a 5 kg box at an angle of 60° above the horizontal.  (a)  What is the work done by the 60 Nt force on the box if the box moves a distance of 2 m across the floor? (b)  What is the work done by the normal force?:  (c)  If the box moves at a constant speed, what is the work done by friction on the box?:  (d)  What is the work done by gravity on the box?  (e)  What is the total work done by all of the forces on the box?

An applied force of 20 N i pushes an object that is initially at rest over a horizontal surface. The coefficient of kinetic friction is 0.450 and the mass is 1.4 kg. If the net work done at some point is 60.6 J, what is the object's speed at that point?

A sled with total mass m = 46.3 kg is pulled a distance d = 17.1 m across a horizontal surface for which the corficcient of kinetic friction with the sled is = 0.196. The pulling force is constant and makes an angle = 31.2° above the horizontal and the sled moves at a constant velocity. Find an expression for the work done by the pulling force in terms of m, acceleration due to gravity g, 0, Hk, and d, and use it find the work done in Joules by the pulling force. Find an expression for the work done on the sled by friction in terms of m, acceleration due to gravity g, 8, HK, and d, and use it to find the work done in Joules by the friction force. What is the net work in Joules done on the sled?

A 28-kg block is pulled along the ground for a distance of 5.1 m by an 85 N force at an angle of 21 degrees with respect to the horizontal. The coefficient of kinetic friction is 0.22.  Find the work done (in J) by the force of friction.   Find the work done (in J) by the force of friction.

Starting from rest, a 4.3-kg block slides 2.40 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is p, = 0.436. (a) Determine the work done by the force of gravity. (b) Determine the work done by the friction force between block and incline. (c) Determine the work done by the normal force. (d) Qualitatively, how would the answers change if a shorter ramp at steeper angle were used to span the same vertical height?

A 50 N force is applied at an angle to the side of a box causing it to slide across a floor. The total work done to move the box 10m is 150 J (joules).  A) what is the angle at which the force was applied?  B) if the box has a weight of 735 N, what is the mass of the box?