Mechanics | Relativity Answers

Pressure gauge indicate that the pressure at point 1 is 10kgPa greater than the pressure at point 2. The cross sectional area at point 2 is 1/5th the cross sectional area at point 1. Determine the speed of the air at point 2

Three particles are situated in 3-D space. The position of each particle is represented by the following vectors:
• A 5-kg particle at r1 = 4i + 3j + 5k
• A 3-kg particle at r2 = –3i + 5j + 3k
• A 6-kg particle at r3 = 5i – 6k
a. Find the location of the center of mass of these particles

a 1.2 x10^3 kg block starting from rest is accelerated by a 2.20x10^3 N force for a distance of 50.0 m along a horizontal surface

a body stands on a scale in the elevator if the scale reads 627.2 when the elevator is stationary, what will it read when the elevator is moving upward with an acceleration of 3.0m/s, a constant speed and a deceleration of 2m/s

define newtons law

Find how fast (a) the volume, (b) the surface area, (c) the diagonal, of
a cube increases when the length of the edge increases

A person having a mass of 60 kilograms exerts a horizontal force of 200 newtons in pushing a 90-kilogram object a distance of 6 meters along a horizontal floor. He does this at constant velocity in 3 seconds.The force of friction is

A 30 kg mass is resting on a rough, horizontal surface. A horizontal force of 100 N is required just to start it moving. What is the approximate value for the coefficient of static friction?

If a spring is doubled in length, then the potential energy stored in the spring will be

m,= 3 kg and m;= 15 kg are connected by strings over pulleys to m;= 2 kg in Figure. There isn't friction force on surface. The direction of acceleration a is given in Figure. (a) Draw the free-body diagram.

(b) Find the acceleration

(c) Find the tensions in the strings.(g=9.8 m/s2 sin37=0.6 cos 37=0.8)