An engine turns at 250 revolutions per minute and its stroke is 450 mm. Find the average piston speed in meters per minute, and the speed of the centre of the crank pin in meters per minute.

A shaft is uniformly accelerated from 10 rev/s to 18 rev/s in 4 seconds. The shaft continues to accelerate at this rate for the next 8 seconds. Therefore, the shaft rotates with a uniform angular speed. Find the total time to complete 400 revolutions.

For a belt and 2-pulley system, the pitch diameters of the pulleys are 4 inches and 10 inches.  Larger pulley is the driver.  The center distance is 24 inches.  If the angular speeds of the smaller and larger pulleys are 250 RPM and 100 RPM respectively, determine linear velocity in ft/min.

two pulleys are connected by a belt. The nubers of RPM of the two pulleys vary inversely as their diameters. A pulley having a diameter of 25cm is turning at 900 rpm. what is the number of RPM of the second pulley wgich has a diameter of 40cm

use 4 decimal in the solution

Find the magnatidue of VB(ft/s): Find the angle of VB(degrees)

For items 4-5, consider the slider-crank mechanism shown. Crank AB is 0.500 m long. Rod BD is 1.500 m long. The velocity at point B is 0.500 m/s, ↖45.0°. Which of the following gives the closest value to the speed of the piston at D? Which of the following gives the closest values of the lengths of the sides of the triangle formed by points B and D and point C, the instantaneous center of rod BD?

B4

Two cylinders rolling together have a speed ratio of 3:1. The center-to-center distance is 30in. Find the diameters of the cylinders if they are rotating in (a) the opposite direction, and (b) same direction.

I'm not sure how to do this.