Force ICSE 10

a body is pivoted at a point .A force of 20N is applied at a disatance of 30cm from the pivot .Calculate the moment of force about the pivot

• 4Nm

• 5Nm

• 6Nm

a mechanic can open a nut by applying a force of 150N while using a lever handle of length 40cm. How long a handle is required if he wants to open it by applying a force of only 50N?

• 1.1m

• 1.2m

• 1.3m

a force of 50 dynes acts on a rigid body, such that perpendicular distance between fulcrum and the point of application of force is 75cm.Calculate the moment of force

• 3450 dyne cm

• 3750 dyne cm

• 3570 dyne cm

a force F=5N acts at point a and produces a moment of force of 6Nm about point O.Find the diameter of the wheel?

• 24m

• 2.4m

• 2.0m

the velocity and speed is constant and acceleration is zero in

• uniform circular motion

• uniform linear motion

• non-uniform circular motion

the center of gravity of a uniform ball is

• at its geometrical center

• at its bottom

• at its top most point

earth moves around the sun with uniform velocity

• true

• false

Is it BALANCED?

• Yes

• No

Where will be the centre of gravity of a uniform rod lies ?

• At its end

• At its middle point

• At its centre of its cross sectional area

• Depends upon its material

Do all objects have a centre of gravity?

• No objects have a centre of gravity

• Only some objects have a centre of gravity

• Only very heavy objects have a centre of gravity

• Yes all objects have a centre of gravity