Mechanics | Relativity Answers

A small frictionless car runs down a ramp, and around the inside of a vertical, circular, loop of track. If the car takes a circular path of radius 20 cm as it goes around the loop and the car starts from rest, calculate the minimum starting height, h, on the ramp at which the car must start to complete the loop without losing contact with the track.

PET has a Young's, Modulus of 3.5 GPa and PLGA 1.2 GPa. A polymer blend is prepared with 40:60 mixture (PET:PlGA) . What is the Young's, Modulus of this blend (use mixture rule). Calculate the percent load borne by PET when the blend is subjected to a load. If after 10 days, half of PET and one third of PLGA had degraded, what is the Young's Modulus of this blend.

A car, initially at rest, travels from 0 m/s to 15.2 m/s in 20.3 s. What is the car's acceleration?

A car initially traveling at 69.7 mi/h, slows to rest in 9.1 s. What is the car's acceleration?

A car initially at rest, accelerates at 7.29 m/s to the 2nd power for 11.3 s. How far did it go in this time?

A small frictionless car runs down a ramp, and around the inside of a vertical, circular, loop of track. If the car takes a circular path of radius 20 cm as it goes around the loop and the car starts from rest, calculate the minimum starting height, h, on the ramp at which the car must start to complete the loop without losing contact with the track.

The period of a 2 kg stone is rotated in a vertical circle on a 2 m cord with the period of 1 s.

Give the magnitude of the radial acceleration in m/s².

A uniform pencil floats with 8cm of it's length immersed in water. What length is immersed when it floats in a glycerol of density 1.3×10³ kg/m³?(density of water=1.0×10³ kg/m³)

1. A stone is thrown straight up at a speed of 12 m / s.

a. After how long does the stone turn down again?

b. How high does the stone reach before it turns?

the volume of acetylene in a tank with a tight-fitting piston is 5.70 cubic feet. the gage pressure is 28.2 psi. the volume of the tank is increased until the new gage pressure is 20.0 psi. what is the new volume of the acetylene in the tank? assume that the temperature remains the same as the volume increased and that there is standard atmospheric pressure.