Mechanics | Relativity Answers

A car accelerates uniformly from rest and reaches a speed of 18.7 m/s in 6.3 s. The diameter of a tire is 39.4 cm.

Find the number of revolutions the tire makes during this motion, assuming no slip- ping.

Answer in units of rev.

A man with a mass of 80 kg sits in a bosun's chair of mass 10 kg. He pulls on the rope he is holding in order to accelerate himself up. He presses down on the seat with a force of 392 N. Find the acceleration of the man and the tension in the rope supporting the pulley

An object A of mass 4kg is connected via a light string of a negligible mass over a light frictionless pulley of object B with a mass of 2kg l. Object A slides horizontally on a rough surface while object B slides vertically downwards at 3 meters per second square as shown in the diagram velow

Three forces act on an object in the horizontal plane. A 30 N force act to the right a 50 N force acts to the left and a 40 N force acts to the right which resultant force is acting on the object

A boat is heading straight across a river which is 600m wide. At the same time, the river current carries the boat 150m downstream use a vector diagram to find the resultant displacement of the boat when it reaches the opposite bank of the river

What must be the magnitude and direction of the equilibrant force needed to keep the pole in equilibrium

A boat is heading straight across a river which is 600mwide.at the same time, the river current carries the boat 150m downstream. Use a vector diagram to find the resultant displacement of the boat when it reaches the opposite bank of the river

A solid rigid body rotating about an axis has a mass of 20kg and a radius of 2m from the axis of rotation.if its angular velocity is 25 rad/s,calculate its rotational kinetic energy

Is it TRUE that angular momentum is conserved?

State the law that governs it

Explain the term Angular momentum of a body about an axis