Mechanics | Relativity Answers

A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it moves with a speed of 51.85 ⁄ and rotates with a frequency of 2857rpm. What is the kinetic energy of the golf ball?

We have a horizontal spring with a mass attached to oscillating with a maximum displacement of A on either side. At which intermediate displacement the kinetic energy would equal to the potential energy

 A constant force of 40 N is applied by a merchandiser on 6 seater dining table along a smooth horizontal plane. The dining table starts from rest and observed to move 100 meters in 5 seconds. . Find a) acceleration of the dining table b) mass of the dining table.

A projectile is fired at an angle of 60 degrees with initial velocity of 100m/s find, time of asent, time of flight, maximum height reached, range, maximum possible rang

A projectile is fired at an angle of 60 degrees with initial velocity of 100m/s find, time of asent

A particle is projected from a point O with an initial velocity of 56m/s at an angle 60 to the horizontal. Find it's vertical displacement when its horizontal displacement is 70m

A projectile is fired from the surface of the earth with a speed of 200m/s at an angle of 30⁰ above the horizontal. If the ground is level, what is the maximum height reached by the projectile

Location of the center of mass x0 = 50.0 cm

Two masses are to be suspended from the meter stick. Given the position of the first mass, calculate the position of the second mass such that the system is in equilibrium.

Case 1:

m1 = 50.0 g 

x1 = 25.0 cm 

d1 = |x1-x0| = 

 τccw = 

m2 = 35.0 g 

d2 = 

x2 = 

τcw = 

Case 2:

m1 = 50.0 g 

x1 = 15.0 cm

d1 = |x1-x0| = 

τccw = 

m2 = 125.0 g

d2 = 

x2 = 

τcw = 

Case 3:

m1 = 100.0 g 

x1 = 45.0 cm

d1 = |x1-x0| = 

τccw = 

m2 = 

x2 = 70.0 cm

d2 = |x2-x0| =

τcw =

Case 4: 

m1 = 120.0 g 

x1 = 40.0 cm

d1 = |x1-x0| = 

m2 = 50.0 g 

x2 = 90.0 cm 

d2 = |x2-x0| = 

m3 = 50.0 g 

d3 = 

x3 = 

τccw = 

τcw = 

A 100g bullet is fired on a ballistic gel with a force constant of 200N/m/s. The ballistic gel is large enough to cover the trajectory of the bullet. If the initial speed of the bullet is 700m/s upon entering the ballistic gel, how long (in seconds) will it take the gel to slow the bullet to 0.01m/s? Ignore acceleration due to gravity. 

Abbot and Costello are transporting a 0.125m3 cubic block along a ramp inclined at 20°. They tied the

block under the midpoint of a 3m, 2kg, pole-arm. Abbot is at the lower end of the pole while Costello

leads the pair up, holding the other end of the pole. Calculate the upward forces exerted by Abbot

and Costello during the transport if the block weighs 1000N.