A 55 kg block is pulled along the ground for a distance of 7.1 m by a 89 N force at an angle of 41 degrees with respect to the horizontal. The coefficient of kinetic friction is 0.33.   Find the work done, in J, by the force of gravity.   Find the work done, in J, by the force of friction.   Find the work done, in J, by the applied force.   Find the work done, in J, by the normal force exerted by the ground.

Your answer is partially correct. The (non-conservative) force propelling a 1.10 x 10-kg car up a mountain road does 7.50 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 26.0 m/s at an altitude of 2.20 x 102 m above sea level. Obtain the work done on the car by the combined forces of friction and air resistance, both of which are non-conservative forces. Number 4757000 Units eTextbook and Media Hint Save for Later Attempts: 4 of 10 used Submit Answer h 77% 74°F Mostly 画 Home End Insert F5 F6 F7 F8 De F9 F10 F1 F12 % Bac 7 8 R Y U | G H J K L VBN M

A shopper in a supermarket pushes a cart with a force of 41 N directed at an angle of 25° below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed. (a) Find the work done by the shopper as she moves down a 42.0-m length aisle. Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. J (b) What is the net work done on the cart? Why? This answer has not been graded yet. (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesn't change, would the shopper's applied force be larger, smaller, or the same? What about the work done on the cart by the shopper? This answer has not been graded yet.

A block of mass m = 2.50 kg is pushed d = 2.70 m along a frictionless horizontal table by a constant applied force of magnitude F = 18.0 directed at an angle ? = 25.0° below the horizontal (a) Determine the work done by the applied force.= J (b) Determine the work done by the normal force exerted by the table.= J (c) Determine the work done by the force of gravity.= J (d) Determine the work done by the net force on the block.= J