1

IIT-JEE 1984

True or False
A simple pendulum with a bob of mass m swings with an angular amplitude of $$40^\circ $$. When its angular displacement is $$20^\circ $$, the tension in the string is greater than mg cos$$20^\circ $$.
A
TRUE
B
FALSE
2

IIT-JEE 1981

True or False
When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.
A
TRUE
B
FALSE
3

IIT-JEE 1980

True or False
A rocket moves forward by pushing the surrounding air backwards.
A
TRUE
B
FALSE

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