A glass marble whose mass is $100 \mathrm{g}$ falls from a height of $40 \mathrm{m}$ and rebounds to a height of $10 \mathrm{m}$. Find the impulse and average force between the marble and the floor if the time of contact is $0.15 s$.

A hammer weighing $2 \mathrm{kg}$ and moving with a speed of $5 \mathrm{m}/\mathrm{s}$ strikes the head of a nail and drives it $10 \mathrm{cm}$ into a wall. Neglecting the mass of the nail, calculate

(i) Acceleration during impact

A hammer weighing $2 \mathrm{kg}$ and moving with a speed of $5 \mathrm{m}/\mathrm{s}$ strikes the head of a nail and drives it $10 \mathrm{cm}$ into a wall. Neglecting the mass of the nail, calculate

(ii) Interval during the impact

A hammer weighing $2 \mathrm{kg}$ and moving with a speed of $5 \mathrm{m}/\mathrm{s}$ strikes the head of a nail and drives it $10 \mathrm{cm}$ into a wall. Neglecting the mass of the nail, calculate

(iii) Impulse.

A $5 \mathrm{kg}$ shell is fired with a nozzle velocity of $700 \mathrm{m}/\mathrm{s}$ from a gun of barrel length $2.4 \mathrm{m}$ long. Calculate the average value of

(i) Acceleration

A $5 \mathrm{kg}$ shell is fired with a nozzle velocity of $700 \mathrm{m}/\mathrm{s}$ from a gun of barrel length $2.4 \mathrm{m}$ long. Calculate the average value of

(ii) The time 

A $5 \mathrm{kg}$ shell is fired with a nozzle velocity of $700 \mathrm{m}/\mathrm{s}$ from a gun of barrel length $2.4 \mathrm{m}$ long. Calculate the average value of

(iii) The force