Fill In the BlanksFor a given height, ………… the length l of the inclined plane, lesser will be the effort required.
One Word AnswersName one property of waves that do not change when the waves pass from one medium to another?
Short Answer TypeA force is applied in i) a non- rigid body and ii) a rigid body. How does the effect of the force differ in the above two cases?
A force when applied on a rigid object does not change the inter-spacing between its constituent particles and therefore it does not change the dimensions of the object, but causes motion in it.
On the other hand, a force when applied on a non-rigid object, change the inter-spacing between its constituent’s particles and therefore cause a change in its dimensions.
A metallic ball is hanging by a string from a fixed support. Draw a neat labelled diagram showing the forces acting on the ball and the string.
i) When does a force do work?
ii) What is the work done by the moon when it revolves around the Earth?Calculate the change in kinetic energy of a moving body if it’s velocity is reduced to 1/3rd of the initial velocity.
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