Advertisements
Advertisements
Questions
The hand flour grinder is provided with a handle near the rim.
Explain the following:
The handle of hand flour grinder (chakki) is provided near its edge.
Advertisements
Solution
The stone of hand flour grinder is provided with a handle near its rim (i.e., at maximum distance from centre) so that it can easily be rotated about the iron pivot at its centre by applying a small force at the handle.
RELATED QUESTIONS
Name the factors affecting the turning effect of a body
The S.I. unit of force is kgf. (kilogram-force)
How does the effect of force differ when it is applied on a non-rigid body?
The steering wheel of a vehicle is of large diameter.
The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
Write an expression for the change in momentum of a body of mass m moving with velocity v if v << c.
State Newton's Second law of motion. Under what conditon does it take the form F = ma?
Name of S.I. unit of the rate of change in momentum.
A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following
1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?
2) Is there any force acting on the rocket? if yes, how much?
A body X of mass 5 kg is moving with velocity 20 m s-2 while another body Y of mass 20 kg is moving with velocity 5 m S-1. Compare the momentum of the two bodies.
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
The diagram in the figure shows a uniform metre rule weighing 100 gf, pivoted as its centre O. two weight 150 gf and 250 gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm . Calculate
the total anticlockwise moment about o.

Calculate the resultant moment of forces about O and state its direction in fig.

Define non-contact forces.
State when the moment of force is positive and when it is negative.
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
