Advertisements
Advertisements
Question
An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where it is used.
Advertisements
Solution
The number of teeth in the driving wheel is nB = 32 and that in the driven wheel is nA = 8. Hence, this system is used to obtain the gain in speed
The Gain in speed = `n_B/n_A`= `32/8 = 4`
APPEARS IN
RELATED QUESTIONS
In a door, handle is provided ......... from the hinges.
State two effects of a force when applied on a body.
Write the expression for the moment of force about a given axis of rotation.
Name of S.I. unit of the rate of change in momentum.
A car of mass 600 kg is moving with a speed of 10 m-1 while a scooter of mass 80 kg is moving with speed of 50 m s-1. which vehicle will require more force to stop it in the (1) same interval of time (2) same distance
A wheel of diameter 2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about
- the centre O, and
- the point A.
Define the moment of force.
Give an example of the following uses of a machine:
to change the direction of force
State the effects that a force can produce. Given one example of each.
A person standing in front of a cliff fires a gun and hears its echo after 3 s. If the speed of sound in air is 336 ms−1.
- Calculate the distance of the person from the cliff.
- After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.
