Basic Physics - Gurumuda.Net

Nonuniform circular motion – problems and solutions

1. A wheel 1 meter in radius accelerates uniformly at 2 rad/s2. Determine the angular acceleration and the angular speed of the wheel, 2 seconds later. Known : Radius (r) = 1 meter Angular acceleration (α) = 2 rad/s2...

Uniform circular motion – problems and solutions

1. An object moves in a circle with the constant angular speed of 10 rad/s. Determine (a) Angular speed after 10 seconds (b) Angular displacement after 10 seconds. Known : Angular speed (ω) =10 rad/s Wanted : (a) Angular...

Centripetal force in uniform circular motion – problems and solutions

1. A 0.1-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 50 cm and ball’s angular speed is 4 rad s-1. What is the magnitude of the centripetal force? Known :...

Uniform motion in a horizontal circle – problems and solutions

1. A 0.2-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 1 meter and ball’s maximum speed is 10 rpm. What is the magnitude of the centripetal acceleration and the magnitude...

Rounding a banked curve – dynamics of circular motion problems and solutions

1. A car rounding a banked curve. What is an angle for the road which has a curve of radius 60 meters with a design speed of 20 m/ s? Assume there is no friction between car and road....

Rounding a flat curve – dynamics of circular motion problems and solutions

1. A 2000-kg car rounds a curve on a flat road of radius 150 m. The coefficient of static friction is 0.5. Determine the maximum speed so the car follows the curve and not skid. Acceleration due to gravity...

Two bodies with the same magnitude of acceleration – Application of Newton’s law of motion problems and solutions

1. Two masses m1 = 2 kg and m2 = 5 kg are on inclined plane and are connected together by a string as shown in the figure. The coefficient of the kinetic friction between m1 and incline is...

Equilibrium of the bodies on a inclined plane – application of the Newton’s first law problems and solutions

1. A 2-kg block lies on a rough inclined plane at an angle 37o to the horizontal. Determine the magnitude of the external force exerted on the block, so the block is not slides down the plane. (sin 37o...

Equilibrium of bodies connected by cord and pulley – application of Newton’s first law problems and solutions

1. A box of mass 5 kg is on an inclined plane at an angle 30o. The box supported by a cord. Determine the tension force (T) and the normal force (N)! Solution ∑Fx = 0 T – w...

Particles in two-dimensional equilibrium – application of Newton’s first law problems and solutions

1. Find the tension force T1, T2, and T3. Ignore cord’s mass. Solution (a) Free-body diagram for object (b) Free-body diagram for cord Apply the Newton’s first law on the object : ΣFy = 0 T1 – w =...