Mechanics | Relativity Answers

force of 2N in tangentially applied to a bicycle wheel for 4 seconds, then removed. If the moment of inertia of the wheel is 3 kg m² , The angular velocity of the wheel after 6 seconds. (radius of the wheel 30 cm) *

Three objects m1, m2 and m3, with masses 5.00 kg, 2.00 kg and 3.00 kg respectively, are attached by light strings that passes over frictionless pulleys as shown in Figure 2. The table is rough and has a coefficient of kinetic friction of 0.250.
(a) Draw the free body diagrams of each of the objects.
(b) Determine the acceleration of each object and their directions.
(c) Determine the tensions in the two strings.

5.Let A be an arbitrary vector and let n be a unit vector in some fixed direction. Show that A=(A*widehat n)widehat n+(widehat n times A)times widehat n ..

Find the centre and radius of the equation of the circle. 2x^2+2y^2-8x+5y+10=0

An object is released from rest and falls under the action of gravity. After time, t, its momentum is

Calculate the accelerating force needed to change the speed of 20lb object from 18ft/s to 50ft/s in a distance of 40ft

Why do you tend to leam backward when carrying a heavy load in your arms?

How can a rocket change direction when it is far out in space and essentially in a vacuum?

At takeoff, a rocket launched vertically from Earth has 2500 kg, 1500 kg of which is fuel. (a) If the initial acceleration of the rocket os 4.9 m/s^2 and its fuel consumption is 15 kg/s, find the speed of the exhaust gases. (b) What is the final acceleration of the rocket? Ignore the variation of g with altitude.