Advertisements
Advertisements
प्रश्न
To obtain a given moment of force for turning a body, the force needed can be decreased by
विकल्प
applying the force at the pivoted point
applying the force very close to the pivoted point
applying the force farthest from the pivoted point
none of the above
Advertisements
उत्तर
applying the force farthest from the pivoted point
APPEARS IN
संबंधित प्रश्न
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.
State one way to decrease the moment of a given force about a given axis of rotation.
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.
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.
State Newton's third law of motion.
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?
Classify the following amongst contact and non-contact forces.
Frictional force
In a beam balance when the beam is balanced in a horizontal position, it is in ________ equilibrium.
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.
