Mechanics | Relativity Answers

Hannah with a mass of 56.2 kg) is traveling at a speed of 12.8 m/s at the top of a 19.5-m high roller coaster Loop in a THEME park.

Find the following:

A.Hannah’s kinetic energy at the top of the loop.

B.Hannah’s potential energy at the top of the loop.

C.Assuming negligible losses of energy due to friction and air resistance, determine Hannah’s total

mechanical energy at the bottom of the loop (h=0 m).

D.Determine Hannah’s speed at the bottom of the loop.

An American ski jumper has a mass of 59.6 kg. He is moving at a speed of 23.4 m/s at a height of 44.6 meters above the ground. Determine the total mechanical energy of the jumper.

a. 4.42 x 10⁴ Jb. 4.24 x 10 ^-4 Jc. 4.24 x 10 ³ Jd. 42. 24 x 10⁴ J

1. A nitrogen molecule can be thought of as two point masses (m of each = 14u, where u = 1.67 x 10-27 kg) separated by a distance of 1.3 x 10-10 m. In air at room temperature the average rotational kinetic energy of such a molecule is about 4.0 x 10-21 J. Find the moment of inertia of such a molecule about its center of mass, and its speed of rotation in revolutions per second. 

during a 10 minute period, a weigth lifter lifts a 30 kg dumbbell 50 times, from the floor level to a height of 1.75 meters. what is the average power ( in horse power) done by the weight lifter

Calculate the specific weight, specific mass, specific volume and specific gravity of a liquid having a volume of 5 cubic meters and its weight is 35 kilo newton

The resonant frequency f of a closed air column is known to depend on the pressure p and the density, of the air and the length, L of the air column. How are these quantities related

Two projectiles are thrown with the same initial velocity, one at an angle and the other at

an angle of . (a) Can both projectiles strike the ground at the same distance from the

projection point? (b) Can both projectiles be in air for the same time interval?

An American ski jumper, has a mass of 59.6 kg. He is moving at a speed of 23.4 m/s at a height of 44.6 meters above the ground. Determine the total mechanical energy of the jumper.

a. 4.42 x 10⁴ J                  

b. 4.24 x 10 ^-4 J                 

c. 4.24 x 10 ³ J                    

d. 42. 24 x 10⁴ J

A ship, leaving its port sails due north for 45 kilometers and then 60 kilometers in a direction

of 60 degrees east of north. Determine the location of the ship relative to its port

what is definition of modern physics?