Forces Effects
The force of friction can be reduced by the help of
ball bearing
lubricants
cushion surfaces
all of them
all of them
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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
In order to reduce air and water resistance, objects are shaped in
A. streamline
B. oblongata
C. rectangular
D. conical
A substance will float on surface of water if its density is less than
A. liquid
B. gas
C. both a and b
D. aqueous
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