Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 8

**Physics**

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2).

**Physics**

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2.

**Physics**

A ball of mass 8kg falls from rest from a height of 100m neglecting air resistance. Calculate its kinetic energy after falling a distance of 30m(take g=10m/s^2).

**Physics**

A solid rectangular block measure 0.100*0.080m*0.060m and floats freely in a liquid of density 1354kg/m^2 if the depth of liquid 0.04m up the block largest side. Find the density of the block.

**Physics**

A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.

**Physics**

An object of volume 4cm^3 is totally immersed in liquid of density 1030kg/m^3. Calculate the upthrust of liquid on the object.

**Physics**

A wooden cube of side 5cm floats in water 200cm^2 of its depth below the water surface and ats sides are vertical calculate the density of the wood in g/cm^3.(1) Density of water in 1g(m^-3).

**Physics**

A body of mass 10kg falls from a height of 5m above the ground what is the kinetic energy of the body just before its strike the ground. Weight loss of energy and take g=10m/s^2.

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