Forces Effects
A force which occurs when two surfaces come in contact and slows down motion while acting in
opposite direction
same direction
same and opposite direction
both a and b
same and opposite direction
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The ‘SI’ unit of force isA. watt
B. joule
C. newton
D. kilogram
Forces can easily change the
A. direction of an object
B. gravity of an object
C. density of an object
D. volume of an object
Density has ‘SI’ unit which is
A. kilogram per cubic meter
B. gram per cubic meter
C. meter per kilogram
D. meter per cubic meter
Friction between moving parts of machine causes
A. heat
B. light
C. energy
D. oil
Force can be measured by the help of
A. foci meter
B. spring balance
C. pane balance
D. both a and b
The force of friction can be reduced by the help of
A. ball bearing
B. lubricants
C. cushion surfaces
D. all of them
In order to reduce air and water resistance, objects are shaped in
A. streamline
B. oblongata
C. rectangular
D. conical
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