Consider a book lying on a table. The weight of the book and the normal force by the table on the book are equal in magnitude and opposite in direction. Is this an example of Newton's third law?

A boy pushes a book kept on a table byapplying a force of 4.5 N. Find the work done by the force if the book is displaced through 30 cm along the direction of push.

Consider a circular loop of wire lying in the plane of the table . Let the current pass through the loop clockwise . Apply the Right-hand thumb rule to find out the direction of the magnetic field inside and outside the loop.

A spring of force constant k is kept in the compressesd condition between two blocks masses m and M on the smooth surface of a table as shown in figure .When the spring is released , both the blocks move in opposite directions .When the spring attains the orginal (normal ) position . both blocks lose the constacts with the spring . If x is the intial compression of the spring find the speeds of block while getting detached from the spring .

Find the acceleration of the block and magnitude and direction of frictional force between block A and table, if block A is pulled towards Left with a force of 50 N.

Three boys are pushing horizontally a box placed on horizontal table. One is pushing towards north with a 5sqrt(3) N force. The second is pushing towards east and third pushes with a force 10 N such that the box is in equilibrium. Find the magnitude of the force, second by is applying in newton.

Newton's laws of motion can be applied to a block in liquid also force due to liquid (e.g. upthrust) are also considered in addition to toher forces. A small block of weight W is kept inside. The block is attached with a string connected to the bottom of the vessel. Tension in the string is W//2 Q. If weight of the block is doubled then tension in the string becomes x times and the time calculated above becomes y times then

Newton's laws of motion can be applied to a block in liquid also force due to liquid (e.g. upthrust) are also considered in addition to toher forces. A small block of weight W is kept inside. The block is attached with a string connected to the bottom of the vessel. Tension in the string is W//2 Q. The string is cut. find the time when it reaches the surface of the liquid

A girl pushes her physics book up against the horizontal ceiling of her room as shown in the figure. The book weights 20 N and she pushes upwards with a force of 25 N. The choices below list the magnitudes of the contact force F_(CB) between the celling and the book, and F_(BH) between the book and her hand. Select the correct pair.