Mechanics | Relativity Answers

A parachutist of mass 70 kg jumps from a plane at an altitude of 32 km above the surface of the Earth. Unfortunately, the parachute fails to open. (In the followingparts, neglect horizontal motion and assume that the initial velocity is zero.)

(a) Calculate the time of fall (accurate to 1 s) until ground impact, given no air resistance and a constant value of g.

(b) Calculate the time of fall (accurate to 1 s) until ground impact, given constant g and a force of air resistance given by

How to replace the three forces acting on the 3D bracket by a single equivalent force?

A 92.2 g blue jay flies through the trees in order to land at a bird feeder. If it flies with a constant speed of 24.0 km/h and makes a tight horizontal turn with a radius of 3.50 m, how much centripetal force must its wings exert to

make the turn?

Define the term radius of gryation write the formular for it

the distance moved by a body at the end of t1=3s and t2=5s are 126m and 250m respectively. what is the initial velocity of the body.

the distance moved by a body at the end of t1=3s and t2=5s are 126m and 250m respectively. what is the initial velocity of the body.

What is difference between rotational kinetic energy and linear kinetic energy. Write down their formulas and compare them.

Two spherical masses of mass 2kg each are connected by a light thin rod of length 50cm. Calculate its rotational inertia:

a. about an axis normal to it through its centre

b. about an axis at one of it ends

Evaluate the moment of inertia of a thin rod with axis of rotation at the centre, if its length is 100cm and its mass is 2.3kg

evaluate the moment of inertia of a thin rod with axis of rotation at the centre, if its length is 100cm and its mass is 2.3kg