Mechanics | Relativity Answers

if we make a hole across the earth, and then we drop a ball into it, what will be the behaviour of the ball in the hole. specially at the centre

A box, mass of 10kg, is being pulled to the right with a force of 100N at an angle of 45 degrees above the horizontal. The coefficient of kinetic friction between the box and the floor is 0.2 , what is the acceleration of the box?

What horizontal force is required to drag a sack of rice weighing 115 lbs if the coefficient of friction is 0.24? a) when the force is parallel to the surface, b) when the force makes 38o above the horizontal.

A man slides down on a slide when it is inclined at 32o. What is the coefficient of friction between the man and the slide?

Diagramming
a) Resolving a force to determine normal force and the force of friction.
b) Defining coefficient of friction.
c) Friction on a sliding body and illustrating the angle of repose.

Definition of Terms
a) Friction
b) Gravitation
c) Coefficient of friction
d) Static force of friction
e) Angle of repose

The force which must be applied to the body when the board makes an angle of 45o with the horizontal a) just to make the body move up the plane, b) just to prevent the body from sliding down the plane.

Given an inclined plane with a slope of 1 in 4 measured along the plane. A metal block of mass 2 kg. slides uniformly. What is the coefficient of friction?

If the coefficient of friction between a 500-gram mass and a rough board is 0.4, find the net force acting on the body when a) the board is horizontal and a pull of 100 grams is applied to the body; b) the board makes an angle of 30 degree with the horizontal. Assume force to be always parallel to the board.

Find the push P at an object on the longest side of a right triangle with 30 angle that will keep the body moving upward uniformly, coefficient of friction is 0.20.