A 68 kg swimmer does 510 J of work and gets up to a speed of 2.8 m/s from rest. Compute the non-conservative work done on the swimmer by the water.
The (non-conservative) force propelling a 1.10 x 103-kg car up a mountain road does 6.50 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 20.0 m/s at an altitude of 1.60 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.
The (non-conservative) force propelling a 2.00 x 103-kg car up a mountain road does 6.80 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 30.0 m/s at an altitude of 1.70 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.
The (non-conservative) force propelling a 1.50 x 103-kg car up a mountain road does 6.60 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 24.0 m/s at an altitude of 1.90 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.
54.0-kg skateboarder starts out with a speed of 2.38 m/s. He does 105 J of work on himself by pushing with his feet against the ground. In addition, friction does -230 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 8.53 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give the...
A 57.4-kg skateboarder starts out with a speed of 2.20 m/s. He does 113 J of work on himself by pushing with his feet against the ground. In addition, friction does -224 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 8.70 m/s. Calculate the change (PEf - PE0) in the gravitational potential energy.
A 61.2-kg skateboarder starts out with a speed of 2.26 m/s. He does 107 J of work on himself by pushing with his feet against the ground. In addition, friction does -258 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 5.65 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give...
A 60.7-kg skateboarder starts out with a speed of 2.41 m/s. He does 99.2 J of work on himself by pushing with his feet against the ground. In addition, friction does -212 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 8.11 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give...
A 54.6-kg skateboarder starts out with a speed of 1.65 m/s. He does 118 J of work on himself by pushing with his feet against the ground. In addition, friction does -269 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 7.00 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give...
A 60.0-kg skateboarder starts out with a speed of 2.18 m/s. He does 104 J of work on himself by pushing with his feet against the ground. In addition, friction does -215 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 6.70 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give...
A rope is tried to a tree limb and used by a swimmer to swim into the water below. The person starts from rest with the rope held in the horizontal position at a height of 35.0 m, the swimmer swims downward, and then let go of the rope. If the frictional force is neglected, a) what is the work done by the tensional force of the rope? b) what is the speed of the person as he let go...