Advertisements
Advertisements
प्रश्न
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.
विकल्प
5 N
10 N
20 N
0.2 N
उत्तर
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is 5 N.
Explanation:
`"Force" = "Moment of force"/"Length of lever"`
= `1/0.2`
= 5 N
APPEARS IN
संबंधित प्रश्न
A nut is opened by a wrench of length 20 cm. If the least force required is 2N, find the moment of force needed to loosen the nut.
Thrust is the ............ force acting on a surface.
State Newton's Second law of motion. Under what conditon does it take the form F = ma?
Explain the motion of a planet around the sun in a circular path.
What is the work done when no net force is applied on the body?
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.
Under what condition will a set of gears produce a gain in torque.
Calculate the minimum distance between point of application of force and axis of rotation of a rigid body, if a force 125 N produces a moment of force of 25.75 Nm.
The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel.
- Which force will produce maximum moment about A?
- Give a reason for your answer in (a).
A metal rod AB of length 80 cm is balanced at 45 cm from the end A with 100 gf weights suspended from the two ends.
- If this rod is cut at the centre C, then compare the weight of AC to the weight of BC.
- Give a reason for your answer in (a).
