When the entire sole rests on the ground during walking as in case of a man, it is known as

Why is the pressure on the ground more when a man is walking than when he is standing?

Why is the pressure on ground more when a man is walking than when he is standing ?

A block of mass m and length l is kept at rest on a rough horizontal ground of friction coefficient mu_(k) . A man of mass m is standing at the right end. Now the man starts walking towards left and reaches the left end within time ‘t’. During this time, the displacement of the block is : (Assume the pressing force between the block and the ground remains constant and its value is same as it was initially. Also as sume that the block slides during the entire time (t))

A block of mass m and length l is kept at rest on a rough horizontal ground of friction coefficient mu_(k) . A man of mass m is standing at the right end. Now the man starts walking towards left and reaches the left end within time ‘t’. During this time, the displacement of the block is : (Assume the pressing force between the block and the ground remains constant and its value is same as it was initially. Also as sume that the block slides during the entire time (t))

A man weighing 60 kg is standing on a trolley weighing 240 kg. The trolley is resting on a frictionless horizonral rails. If the man starts walking on the trolley with a constant speed of 1 ms^(-1) then after 4 second. The displacement of the man relative to the ground is :

A man weighing 60 kg is standing on a trolley weighing 240 kg. The trolley is resting on a frictionless horizontal rails. If the man starts walking on the trolley along the rails at speed 1m/s, then after 4 seconds, his displacement relative to the ground will be