Mechanics | Relativity Answers

the physical quantity which is equal to the rate of momentum is impulse(spot the error)

what is the physical signification of momentum

A body is falling from a vertical height of 10 m pierces through a distance of 1 m in sand. Calculate the average retardation in sand. {g=accel. Due to gravity.}

A particle starts with initial speed 'u' and retardation 'a' to come to rest in time T. Calculate the time taken to cover first half of the total path travelled.

If a pushing force making an angle alpha with horizontal is applied on a block of mass m placed on horizontal table and angle of friction is beta ,then minimum of force required to move the block is??

a uniform rod of length 30 cm having a mass of 3.0 kg. The strings are pulled by constant forces of 20 N and 32 N. Find the force exerted by 20 cm part of the rod on the 10 cm part. All the surfaces are smooth and the strings and pulleys are light. Force of 20 N acts on 10 cm part and 32 N on 20 cm

can a body move with constant acceleration but with zero velocity?

the magnitude of two vectors p bar ad q bar differ by 1. the magnitude of their resultant makes an angle of tan inverse (3/4) with p. the angle between p and q is

A ball is hit at an initial speed of 80 m/s. At what angle should it leave the bat if it has to travel 300 m horizontaly?

A block of cement of mass 10 kg is pulled 200 m along a cement floor at 40 m/s . if the block is pulled by a cord making an angle of 45 degrees to the horizontal the coefficient of friction between the block and the floor is 0.54. calculate the tension in the cord ad the work done on the block.