Question

Two Bodies Having Same Mass 2kg Each Have Different Surface are As 50m^2 and 100m^2 in contact with a horizontal Plane. If The Co efficient of friction is 0.2. The Ratio Of Forces Friction On Them While They Are In Motion Is​

Answer 1

Answer:

1

Explanation:

Because friction only relies on the mass of an object irrespective of its surface area in contact with another surface. If the masses of both objects are the same then their frictional force will also be the same.

Answer 2

Answer:

The ratio of forces friction is 1.

Explanation:

Given that,

Mass of first body = 2 kg

Mass of second body = 2 kg

Area of first body = 50 m²

Area of second body = 100 m²

Coefficient of friction = 0.2

We need to calculate the normal force

Using formula of normal force

$F = mg$

$F = 2\times9.8$

$F= 19.6\ N$

We need to calculate the frictional force

Using formula of frictional force

$F_{\mu}=\mu mg$

$F_{\mu}=0.2\times19.6$

$F_{\mu}=3.92\ N$

We need to calculate the ratio of friction forces

The frictional force are same for both objects.

$\dfrac{f_{\mu}_}{f'_{\mu}}=\dfrac{3.92}{3.92}$

The friction force does not depend on the area of the object.

Hence, The ratio of forces friction is 1.