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 ______.
पर्याय
5 N
10 N
20 N
0.2 N
Advertisements
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
In a door, handle is provided ......... from the hinges.
To obtain a given moment of force for turning a body, the force needed can be decreased by
State the effect of force F in of the following diagram.
The hand flour grinder is provided with a handle near the rim.
State one way to obtain greater moment of a given force about a given axis of rotation.
Write an expression for the change in momentum of a body of mass m moving with velocity v if v << c.
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Two unlike forces (parallel) of 10 N and 25 N act at a distance of 12 cm. from each other. Find the point about which the body balance.
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 center, C, then compare the weight of AC to the weight of BC. (Use >, < or =)
- Give a reason for your answer in (a).
