Exercise on Work

1. 1A cart is pulled by a force of 50N. The line of action of the force makes an angle 60∘ to the direction of the displacement. Find the work don by the force to displace the cart through 4 m (neglecting friction).

   

   1. AW=100J
2. 2Calculate the work done by a girl on a bucket of mass 300g that is carried by her through a displacement of 10 m in the horizontal direction. Then, calculate the work done by a boy to lift a bucket of the same mass through a displacement of 10 cm in the vertical direction, (where: g=10m/s², the force of tension= the bucket's weight)

   

   1. AW=0
   2. BW=0.3J
3. 3A force of 100N acts on a body at rest to speed it up uniformly. The body's velocity becomes 20m/s after 5s. FIND the work done by this force[blank_start].[blank_end]

   1. A. 5000J
4. 4A worker that carries a rock of mass 40kg climbs upstairs of length 20m as shown in the figure. If the free fall acceleration=10m/s² and the measure is 30∘, Find the work done on the box.

   

   1. A4000J

Description

Quiz on Exercise on Work, created by Rania Maamoun on 26/07/2020.

Author

Rania Maamoun

Language

English

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19

History

Created on 26 Jul 2020 · updated on 27 Jul 2020

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11th grade

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