A machinist turns the power on to a grinding wheel

Reference no: EM13538138

A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 66 rad/s. The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel slows down uniformly at 1.2 rad/s2 until the wheel stops. In this situation, the angular acceleration of the wheel between t = 0 s and t = 10 s is closest to:

Reference no: EM13538138

Questions Cloud

How fast does the cart move after being loaded with ore : A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 493 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore? Assume that frictional forces with the flat surface may be neglected.

What is the original temperature of the mercury : A 7 kg sample of mercury is completely solidified and liberates 110 kJ of energy. What is the original temperature of the mercury? (The melting point of mercury is 234 K, the heat of fusion of mercury is 11.3 kJ/kg, and the specific heat of mercury i..

What is the velocity of the first car after the collision : A 416 kg car moving at 17.8 m/s hits from behind another car moving at 11.3 m/s in the same direction. If the second car has a mass of 757 kg and a new speed of 13.0 m/s, what is the velocity of the first car after the collision?

The initial temperature of the copper : A 208 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg?K, the heat of fusion for cop..

A machinist turns the power on to a grinding wheel : A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 66 rad/s. The wheel is run at that angular velocity for 37 s and then power is shu..

A machinist turns the power on to a grinding wheel : A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 84 rad/s. The wheel is run at that angular velocity for 37 s and then power is shu..

The increase in the length of the pipe : A steel pipe 22 m long, installed when the temperature was 15°C, is used to transport superheated steam at a temperature of 125 °C. Steel's coefficient of linear expansion is 1.2 × 10-5 K-1. The pipe is allowed to expand freely when the steam is tran..

Coefficients of volume expansion of mercury and glass : A glass flask has a volume of 900 ml at a temperature of 20° C. The flask contains 895 ml of mercury at an equilibrium temperature of 20°C. The temperature is raised until the mercury reaches the 900 ml reference mark. The coefficients of volume expa..

Find magnitude and direction of final velocity of the wreck : Two vehicles approach a right angle intersection and then collide. After the collision, they become entangled. If their mass ratios were 1:3 and their respective speeds as they approached were both 13 m/s, find the magnitude and direction of the fina..

User Account

All Pages