Advertisements
Advertisements
प्रश्न
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall
1) Name the force exerted by the table top
2) What is the direction of the force?
Advertisements
उत्तर
1) The normal reaction force is exerted by the table top.
2) The force is in the upward direction.
APPEARS IN
संबंधित प्रश्न
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes.
How much work each does? Take density of water = 103 kg m-3 and g = 9.8 N kg-1.
How is 1 kgf related to the SI unit of force?
Give the units of couple.
State the condition when the work done by the force is negative.
Relate 1 KWh (kilowatt hour) with joule.
A coolie carries a load of 30 kgf through a distance of 500 m in 5 minutes while another coolie B carries the same load through the same distance in 10 minutes. Compare the
(i) work done, and
(ii) power developed. (Take: g = 10md−2)
A man weighing 700 N runs up a flight of 15 steps, each 20 cm high, in 5 seconds. Calculate the power of the man.
