Exams › GATE › Technical

A block of mass 10 kg rests on a horizontal floor. The acceleration due to gravity is 9.81 m/s². The coefficient of static friction between the floor and the block is 0.2. A horizontal force of 10 N is applied on the block as shown in the figure. The magnitude of force of friction (in N) on the block is ____

1. 2
2. 10
3. 19.62
4. 0

Correct answer: 10

Solution

Maximum static friction = mu*N = 0.2*10*9.81 = 19.62 N. The applied 10 N is less than this, so the block stays at rest and friction exactly balances the applied force at 10 N.

Related GATE Technical questions

• A cylindrical rod of diameter 10 mm and length 1.0 m is fixed at one end. The other end is twisted by an angle of 10° by applying a torque. If the maximum shear strain in the rod is p×10⁻³, then p is equal to ____ (round off to two decimal places).
• A rigid triangular body, PQR, with sides of equal length of 1 unit moves on a flat plane. At the instant shown, edge QR is parallel to the x-axis, and the body moves such that velocities of points P and R are Vp and Vr, in the x and y directions, respectively. The magnitude of the angular velocity of the body is
• Hardendability of steel is a measure of
• The fluidity of molten metal of cast alloys (without any addition of fluxes) increases with increase in
• The cold forming process in which a hardened tool is pressed against a workpiece (when there is relative motion between the tool and the workpiece) to produce a roughened surface with a regular pattern is
• The most common limit gage used for inspecting the hole diameter is

⚔️ Practice GATE Technical free + battle 1v1 →