A spinning wheel is brought in contact with an identical wheel spinning at identical speed.

Let AB = x, So t 1=x /30, and t2 =  x /20  Total time = t1 + t2 = 5x / 60  h.    Average speed for entire journeyTotal distance /Total...

(i) The Spinning Jenny speeded up the spinning process and reduced labor demands. (ii) Many workers were left without any job and became unemployed. (iii) By the use of this machine, a...

(c) Fc is maximum of the three forces.  Explanation: Normal force on a plane bridge is equal to weight of the car. On a convex upward bridge due to the upward inertial force...

(c)  √2v0   Explanation:  Let the radius of the wheel = r.  The angular speed of the wheel ⍵ = v0/r  A particle on the rim of the wheel at the same level as the center...

A wheel rotating at a speed of 600 rpm. ω0 = 600 rpm = 10 revolutions per second. T = 10 sec. (In 10 sec. it comes to rest) ω = 0 Therefore ω0 = –αt α...

The correct answer is all  (a) kinetic  (b) total  (c) mechanical  (d) internal.

(c)  √2v0   Explanation:  Let the radius of the wheel = r.  The angular speed of the wheel ⍵ = v0/r  A particle on the rim of the wheel at the same level as the center...

(a) In case of object moving along a circular path two types of forces centripetal and centrifugal acts upon it. As they have opposite impact thus, the object remains in...

(c) Ball bearings are used to reduce friction and friction is directly propertional to effective surface area. So if effective surface area is reduced then friction will also reduce.

(d) Total number of ways in which 9 balls occupy any of the 6 squares = 9C6 = 84  Number of ways in which one row is not filled = 3  ∴...