Advertisements
Advertisements
प्रश्न
In which one of the following cases is the work done more? When the angle between the direction of motion and that of the force is (i) 90° (ii) 0°.
Advertisements
उत्तर
When the angle between the direction of motion and that of the force is 90°;
W = Fd cos 90° = 0
When the angle between the direction of motion and that of the force is 0°;
W = Fd cos 0° = Fd
Hence in the second case, when the angle is 0°; the work done is more.
APPEARS IN
संबंधित प्रश्न
Draw a simplified diagram of a lemon crusher, indicting of load and effort
A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road.
Who does more work against the force of gravity and why?
Give an example when work done by the force of gravity acting on a body is zero even though the body gets displaced from its initial position.
What physical quantity does the electron volt (eV) measure? How is it related to the S.I. unit of that quality?
kWh is the unit of ______.
The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.
How is 1 kgf related to the SI unit of force?
In the following case write yes, if the work is being done and no if no work is being done.
A man moving on the rough ground.
State two conditions for work to be done.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
