Damp clothes are dried in spin dryers by the action of
A). Centripetal forces
B). Centrifugal forces
C). Central forces
D). Non central forces
What type of force acts on a car moving around a curve?
A). Centrifugal force
B). Cohesive force
C). Centripetal force
D). Gravitational force
When an unbalanced force acts on an object
A). Causes change in motion of the object
B). The speed & direction of the object will change
C). Causes the object to move
D). All of the above
The washing machine works on the principle of
A). Dialysis
B). Diffusion
C). Reverse osmosis
D). Centrifugation
A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
A). Depends on their masses
B). Sphere
C). Disk
D). Both reach at the same time