In a situation the contact force by a rough horizontal surface on a body placed on it has constant magnitude if the angle between this force and the vertical is decreased the frictional force between the surface and the body will?

Increase

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Decrease

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Remain the same

No worries! We‘ve got your back. Try BYJU‘S free classes today!

May increase or decrease

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Decrease
decreases
Let the magnitude of contact force be F and angle between F and vertical be Θ. The vertical and horizontal components of this contact force F are Normal force and Friction force respectively. See the figure below:-
Friction force= F.sinΘ
As Θ decreases the value of sinΘ also decreases. Since given that F is constant, so F.sinΘ i.e. Friction force also decreases.

Suggest Corrections

Similar questions

Q. In a situation, the contact force by a rough horizontal surface on a body placed on it has constant magnitude. If the angle between this force and the vertical is decreased, the frictional force between the surface and the body will

Q. In a situation the contact force by a rough horizontal surface on a body placed on it has constant magnitude. If the angle between this force and the vertical is decreased, the frictional force between the surface and the body will
(a) increase
(b) decrease
(c) remain the same
(d) may increase or decrease.

A body of mass 400g slides on a rough horizontal surface. If the frictional force is 3.0 N, find (a) the angle made by the contact force on the body with the vertical and (b) the magnitude of the contact force. Take g = 10 $\frac{m}{s^{2}}$

Q. A body of mass 400 g slides on a rough horizontal surface. If the frictional force is 3.0 N. Find the angle made by the contact force on the body with the vertical.

Join BYJU'S Learning Program