Explain the meaning of the term work done and give an example of where work is done. Calculate the total work done in the following examples a) A 20 kg log lifted 2 m into the air b) Thirty 6 kg boxes lifted onto a shelf 15 m high c) A car of mass 1400 kg pushed 50 m along a road a (u kinetic = 0.3) d) A concrete slab of mass 200 kg pulled 10 m up a slope at an angle of 30° to the horizontal (n=0.6). = . Describe in detail how you would determine the work done by varying force
When light reaches an object, it can travel through the object if the object is transparent. ... Shadows are produced when light hits an opaque object which prevents the light beams from passing through. When an object blocks the light's path, then darkness appears on the other side. This darkness is called a shadow.
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Explain the meaning of the term work done and give an example of where work is done. Calculate the total work done in the following examples a) A 20 kg log lifted 2 m into the air b) Thirty 6 kg boxes lifted onto a shelf 15 m high c) A car of mass 1400 kg pushed 50 m along a road a (u kinetic = 0.3) d) A concrete slab of mass 200 kg pulled 10 m up a slope at an angle of 30° to the horizontal (n=0.6). = . Describe in detail how you would determine the work done by varying force
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When light reaches an object, it can travel through the object if the object is transparent. ... Shadows are produced when light hits an opaque object which prevents the light beams from passing through. When an object blocks the light's path, then darkness appears on the other side. This darkness is called a shadow.