work done by the escalator and the gravitational force

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• Work Done By Constant Force: gravitational force; escalator force

  What is the work done on the man by (a)the gravitational force and (B) the escalator? Solution. Denote the vertical distance and the mass of the man by h and m, respectively.

• Work and energy: Man on an escalator; speed that arrow leaves the bow; work done on a basketball by air resistance

  What is the work done on the man by (a) the gravitational force and (b) the escalator? A 82.8-g arrow is fired horizontally from rest. The bowstring exerts an average force of 62.5 N on the arrow over a distance of 0.908 m.

• Force and work, Work-Energy Theorem, Gravitational Energy, Conservation

  The escalator moves the man at a constant velocity from the ground level to the floor above, a vertical height of 4.60 m. What is the work being done on the man by (a) the gravitational force and (b) the escalator?

• Work done in moving a rock.

  The magnitude of the work done is measured by the scalar product of the force and the displacement.

• A gravitational force case is illustrated.

  done by gravitational force is negative because displacement and gravitational force are in opposite direction.

• Gravitational force as object moves up inclined plane

  Thus the work Wg done by the gravitational force Fg is, Wg = Fg d cos φ Wg = m g d cos φ From the diagram, it is clear that φ = 900 + 300 Then, Work done by gravitational force, Wg = m g d cos φ Thus the answer is

• Work done and gravitational force

  The solution calculates the work done and gravitational force.

• work done by gravitational force and potential energy

  The solution shows how to calculate the work done by the gravitational force on the ball. Furthermore, it explains the relationship between the work done and the change of potential energies of the ball.

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  This solution determines the work done by the lifting force, gravitational force, and the new work done on the helicopter.