help@askiitians.com

1800-150-456-789

Mechanics> Which statement is correct about the weig...

question mark

Which statement is correct about the weight of an object and the force of kinetic friction on that object?(A) The weight is always greater than the frictional force.(B) The weight is always equal to the frictional force.(C) The weight is less than the frictional force for sufficiently light objects.(D) The weight can be more or less than the frictional force.

Shane Macguire , 9 Years ago

Grade upto college level

1 Answers

Deepak Patra

Last Activity: 9 Years ago

(A)The weight is always greater than the frictional force.
The kinetic force of friction is given as:
f_k = μ_kN
Here, μ_k is the coefficient of kinetic friction, and N is the magnitude of normal force.
It is important to note that when a block rest on a horizontal surface, the normal force acting on it is equal to its weight W such that.
f_k = μ_kW
However, if the block is kept on an inclined surface at inclination θ then the normal force balance the component of weight perpendicular to the inclined surface, which is W cosθ. Therefore,

Therefore, (A) is the correct option while the rest are ruled out.

Provide a better Answer & Earn Cool Goodies

Enter text here...

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mmat the free end, where a small mass of 2 g is positioned. determine(i) The velocity of the end when passing through the zero position(ii) The acceleration at maximum displacement(iii) The maximum kinetic energy of the mass

mechanics

2 Answers Available

Last Activity: 2 Years ago

An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of springconstant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by thedamping constant b = 0.07kg/s.(i) Find the period of the damped oscillation.(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?

mechanics

1 Answer Available

Last Activity: 2 Years ago

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

mechanics

1 Answer Available

Last Activity: 2 Years ago

A particle is traveling in a circle of radius R =2.5m and with an angular velocity of 10 rad/s. What is the centripetal acceleration of the particle? The particle begins to slow down with an angular acceleration of -1 rad/s2. After 5 seconds, what is the centripetal acceleration and the tangential acceleration fo the particle?

mechanics

1 Answer Available

Last Activity: 2 Years ago

If the acceleration of block A is 5 m/s^2Find the acceleration of block B

mechanics

1 Answer Available

Last Activity: 2 Years ago

View all Questions