Related InterviewSolutions

• A brick measures 12 cm `xx` 6 cm `xx` 3 cm. Initially, it is kept on the ground such that the rectangular surface with the smallest area is in contact with the ground and then it is placed such that the rectangular surface with the largest area touches the ground. Calculate the height of the centre of gravity from the ground in the two cases. Out of the two positions, in which case does the brick have greater stability and why?
• A ball is thrown in upwards direction then the force(s) acting on it is (are)A. gravitational forceB. mechanical forceC. fictional forceD. Both (a) and (c ).
• Two spheres of mass 10 g and 100 g each falls on the two pans of a table balance from a height of 40 cm and 10 cm, respectively. If both are brought to rest in 0.1 second, determine the force exerted by each sphere on the pans.
• We know, `L xx dL = E xx dE`, for a given type of lever, the effort arm is always less than loadarm, thenA. The V.R is less than oneB. The M.A is less than oneC. The given simple machine is a third order leverD. All the above.
• A bottle standing on its base is more stable than when it stands on its neck. This is so because when it stands on the base its ______.A. base area is moreB. centre of gravity is nearer to the baseC. centre of gravity is at the topD. Both (a) and (b).
• A force 50 N acts on a block A of mass 3 kg which is in contact with a block B of mass 2 kg, as shown in the figure. Find the forces acting on A and B. Will the same forces act on A and B if instead of applying the force to A, it is applied to B?
• A bullet of mass 50 g is fired from a gun. If the bullet acquires a velocity of 100 m `s^(1)` in 0.1 second, what is the recoil force on the gun?
• 2 joules of work is done in displacing a stone through 0.5 m. Find the force applied on the stone.
• What is the work done by a horse in displacing a cart through 5 m in the direction of the force if the force applied by the horse is 10 N?
• Bottle lid opener is an example of ______ lever